{"id":557,"date":"2022-09-28T10:12:06","date_gmt":"2022-09-28T10:12:06","guid":{"rendered":"https:\/\/owolff.com.linux20.curanetserver.dk\/?page_id=557"},"modified":"2024-10-03T10:44:08","modified_gmt":"2024-10-03T08:44:08","slug":"active-noise-cancellation","status":"publish","type":"page","link":"https:\/\/owolff.com\/en\/application-support\/active-noise-cancellation\/","title":{"rendered":"Active Noise Cancellation"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lcg9ppdn-2b5907fa9201520c60b52fc4f27ab047\">\n.avia-section.av-lcg9ppdn-2b5907fa9201520c60b52fc4f27ab047{\nmargin-bottom:0px;\n}\n.avia-section.av-lcg9ppdn-2b5907fa9201520c60b52fc4f27ab047 .av-parallax .av-parallax-inner{\nbackground-color:#702423;\nbackground-image:url(https:\/\/owolff.com\/wp-content\/uploads\/2023\/04\/active-noise-cancellation-1.jpg);\nbackground-repeat:no-repeat;\nbackground-position:50% 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class='av-special-heading-tag '  itemprop=\"headline\"  >Active Noise Cancellation<\/h1><div class='av_custom_color av-subheading av-subheading_below'><p>In head- and earphones<\/p>\n<\/div><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><\/div>\n\n<\/div><\/div><\/main><!-- close content main element --><\/div><\/div><\/div><div class='clear'><\/div><div id='sub_menu1'  class='av-submenu-container av-j6wca-d827ec2c86eee5be1276e4835bc1a126 socket_color  avia-builder-el-3  el_after_av_section  el_before_av_section  submenu-style-2 av-sticky-submenu submenu-not-first container_wrap sidebar_right' style='z-index:301' ><div class='container av-menu-mobile-disabled av-submenu-pos-center'><ul id='av-custom-submenu-1' class='av-subnav-menu' role='menu'>\n<li class='menu-item av-1nj1ci-6b3fee00ba60eff95acfc3290da822fd menu-item-top-level menu-item-top-level-1' role='menuitem'><a 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href='https:\/\/owolff.com\/en\/application-support\/diaphragm-design\/'  ><span class='avia-bullet'><\/span><span class='avia-menu-text'>Diaphragm design<\/span><\/a><\/li>\n<li class='menu-item av-udpvu-e1bbe7aa4d2d4c10eebfb8b1ae823c25 menu-item-top-level menu-item-top-level-5' role='menuitem'><a href='https:\/\/owolff.com\/en\/application-support\/headphones-and-earphones\/'  ><span class='avia-bullet'><\/span><span class='avia-menu-text'>Head- and earphones<\/span><\/a><\/li>\n<li class='menu-item av-qbo62-ed4fc6559f9ecc15693b255a1c6f8ef9 menu-item-top-level menu-item-top-level-6' role='menuitem'><a href='https:\/\/owolff.com\/en\/application-support\/simulation-in-comsol-multiphysics\/'  ><span class='avia-bullet'><\/span><span class='avia-menu-text'>Simulation in Comsol Multiphysics\u00ae<\/span><\/a><\/li>\n<li class='menu-item av-megu2-f840722b0e8b5793f96f9f727735da54 menu-item-top-level menu-item-top-level-7' role='menuitem'><a 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><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-7l0d1-88b76b5dc57a7021fe2ff1f6f9060d7f\">\n#top .av-special-heading.av-7l0d1-88b76b5dc57a7021fe2ff1f6f9060d7f{\nmargin:80px 0 0 0;\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-7l0d1-88b76b5dc57a7021fe2ff1f6f9060d7f .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-7l0d1-88b76b5dc57a7021fe2ff1f6f9060d7f .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-7l0d1-88b76b5dc57a7021fe2ff1f6f9060d7f .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-7l0d1-88b76b5dc57a7021fe2ff1f6f9060d7f .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-7l0d1-88b76b5dc57a7021fe2ff1f6f9060d7f .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-7l0d1-88b76b5dc57a7021fe2ff1f6f9060d7f .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-7l0d1-88b76b5dc57a7021fe2ff1f6f9060d7f av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-6  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Active Noise Cancellation in head- and earphones<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-ldu6l6xv-5b649c2a03bd494b6566079079754800 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>When designing an earphone or headphone to have Active Noise Cancellation (ANC), many elements will affect the degree of noise cancellation that can be achieved in practice. This page describes the working principles of Active Noise Cancellation, the limitations and which Ole Wolff receivers to use for outstanding ANC perfomance.<\/p>\n<section class=\"av_textblock_section \">\n<div class=\"avia_textblock av_inherit_color \">\n<p class=\"overskiftH3\"><strong>Custom solutions are a big part of what makes Ole Wolff unique<br \/>\n<\/strong>Let the products on the product pages serve as inspiration and don\u2019t hesitate to contact us for a tailored solution for your specific product.<\/p>\n<\/div>\n<\/section>\n<\/div><\/section><\/p><\/div><div class='av-flex-placeholder'><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-43967-85bbfbb7ba50282f740f6f7bdabeff82\">\n.flex_column.av-43967-85bbfbb7ba50282f740f6f7bdabeff82{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-43967-85bbfbb7ba50282f740f6f7bdabeff82 av_one_third  avia-builder-el-8  el_after_av_two_third  avia-builder-el-last  flex_column_table_cell av-equal-height-column av-align-middle av-animated-generic right-to-left av-zero-column-padding  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lcsv6tyc-e0d0bc73e2cf935da58ee8e6c3f1114a\">\n#top .hr.hr-invisible.av-lcsv6tyc-e0d0bc73e2cf935da58ee8e6c3f1114a{\nheight:100px;\n}\n<\/style>\n<div  class='hr av-lcsv6tyc-e0d0bc73e2cf935da58ee8e6c3f1114a hr-invisible  avia-builder-el-9  el_before_av_button  avia-builder-el-first '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<div  class='avia-button-wrap av-141q93-2d6729bf574df811edde6b83a91488bf-wrap avia-button-center  avia-builder-el-10  el_after_av_hr  avia-builder-el-last  button-front-2'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-141q93-2d6729bf574df811edde6b83a91488bf\">\n#top #wrap_all .avia-button.av-141q93-2d6729bf574df811edde6b83a91488bf{\ncolor:#bf4542;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-141q93-2d6729bf574df811edde6b83a91488bf:hover{\nbackground-color:#ffffff;\ncolor:#ffffff;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-141q93-2d6729bf574df811edde6b83a91488bf .avia-svg-icon svg:first-child{\nfill:#bf4542;\nstroke:#bf4542;\n}\n#top #wrap_all .avia-button.av-141q93-2d6729bf574df811edde6b83a91488bf:hover .avia-svg-icon svg:first-child{\nfill:#ffffff;\nstroke:#ffffff;\n}\n<\/style>\n<a href='https:\/\/owolff.com\/en\/acoustics\/headphone-earphone-drivers\/'  class='avia-button av-141q93-2d6729bf574df811edde6b83a91488bf av-link-btn avia-icon_select-yes-right-icon avia-size-large avia-position-center avia-color-light'   aria-label=\"Active noise cancellation drivers\"><span class='avia_iconbox_title' >Active noise cancellation drivers<\/span><span class='avia_button_icon avia_button_icon_right avia-iconfont avia-font-entypo-fontello' data-av_icon='\ue875' data-av_iconfont='entypo-fontello' ><\/span><\/a><\/div><\/p><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-3ycxr-d1f7bc7116088ae3a23b173910065b69\">\n.avia-section.av-3ycxr-d1f7bc7116088ae3a23b173910065b69{\nbackground-color:#f9f9f9;\nbackground-image:unset;\n}\n<\/style>\n<div id='av_section_3'  class='avia-section av-3ycxr-d1f7bc7116088ae3a23b173910065b69 main_color avia-section-large avia-no-border-styling  avia-builder-el-11  el_after_av_section  el_before_av_section  avia-bg-style-scroll container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-557'><div class='entry-content-wrapper clearfix'>\n<div class='flex_column_table av-gwrjx-33647bceaf67d6b00185e690be01155f sc-av_one_half av-equal-height-column-flextable'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-gwrjx-33647bceaf67d6b00185e690be01155f\">\n#top .flex_column_table.av-equal-height-column-flextable.av-gwrjx-33647bceaf67d6b00185e690be01155f{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-gwrjx-33647bceaf67d6b00185e690be01155f{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-gwrjx-33647bceaf67d6b00185e690be01155f av_one_half  avia-builder-el-12  el_before_av_one_half  avia-builder-el-first  first flex_column_table_cell av-equal-height-column av-align-top av-zero-column-padding  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-g0ogl-e40bc2564ea9d51416d150e8f9edd6ab\">\n#top .av-special-heading.av-g0ogl-e40bc2564ea9d51416d150e8f9edd6ab{\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-g0ogl-e40bc2564ea9d51416d150e8f9edd6ab .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-g0ogl-e40bc2564ea9d51416d150e8f9edd6ab .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-g0ogl-e40bc2564ea9d51416d150e8f9edd6ab .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-g0ogl-e40bc2564ea9d51416d150e8f9edd6ab .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-g0ogl-e40bc2564ea9d51416d150e8f9edd6ab .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-g0ogl-e40bc2564ea9d51416d150e8f9edd6ab .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-g0ogl-e40bc2564ea9d51416d150e8f9edd6ab av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-13  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Working principles<\/h2><div class='av_custom_color av-subheading av-subheading_below'><p>Subtracting the noise<\/p>\n<\/div><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-l8lg3s76-175343abf013a665c2e01f2ced50e5c5 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><div class=\"BrdtekstFutura\">An ANC circuit is basically a loop controlled circuit where one or more microphones, an earphone (receiver) and an ANC controller circuit are involved.<\/div>\n<div class=\"BrdtekstFutura\"><\/div>\n<div class=\"BrdtekstFutura\">An electrical signal (speech or music) is fed into the ANC controller circuit and an electrical noise signal is picked up by a microphone, phase shifted by 180 deg. and fed into the ANC controller circuit as well. The microphone is positioned in a place where best pickup of background noise can be achieved. By phase shifting this noise signal 180 deg., the background noise will ideally be cancelled out and only the pure speech or music signal will reach the earphone and thereby no noise will reach the listeners ear.<\/div>\n<\/div><\/section><\/p><\/div><div class='av-flex-placeholder'><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-8sncl-d2e0d17af8cf3a0230ade0f00356cc21\">\n#top .flex_column_table.av-equal-height-column-flextable.av-8sncl-d2e0d17af8cf3a0230ade0f00356cc21{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-8sncl-d2e0d17af8cf3a0230ade0f00356cc21{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-8sncl-d2e0d17af8cf3a0230ade0f00356cc21 av_one_half  avia-builder-el-15  el_after_av_one_half  el_before_av_hr  flex_column_table_cell av-equal-height-column av-align-top av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lg505w-10c69b69be0c35f49bbfa58b71c0fc94\">\n.avia-image-container.av-l8lg505w-10c69b69be0c35f49bbfa58b71c0fc94 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l8lg505w-10c69b69be0c35f49bbfa58b71c0fc94 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l8lg505w-10c69b69be0c35f49bbfa58b71c0fc94 av-styling- avia-align-center  avia-builder-el-16  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-544 avia-img-lazy-loading-not-544 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Acoustic_noise_cancellation__1.jpg\" alt='' title='Acoustic_noise_cancellation__1'  height=\"200\" width=\"450\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Acoustic_noise_cancellation__1.jpg 450w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Acoustic_noise_cancellation__1-300x133.jpg 300w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/div><\/div><\/div><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lgent3-036d05965b746499cf3109ef7ae56708\">\n#top .hr.hr-invisible.av-l8lgent3-036d05965b746499cf3109ef7ae56708{\nheight:10px;\n}\n<\/style>\n<div  class='hr av-l8lgent3-036d05965b746499cf3109ef7ae56708 hr-invisible  avia-builder-el-17  el_after_av_one_half  el_before_av_heading '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-b4bp1-e36d28eddc97122f95d95077ced1f193\">\n#top .av-special-heading.av-b4bp1-e36d28eddc97122f95d95077ced1f193{\npadding-bottom:20px;\ncolor:#101010;\nfont-size:20px;\n}\nbody .av-special-heading.av-b4bp1-e36d28eddc97122f95d95077ced1f193 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-b4bp1-e36d28eddc97122f95d95077ced1f193 .av-special-heading-tag{\nfont-size:20px;\n}\n.av-special-heading.av-b4bp1-e36d28eddc97122f95d95077ced1f193 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-b4bp1-e36d28eddc97122f95d95077ced1f193 .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-b4bp1-e36d28eddc97122f95d95077ced1f193 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-b4bp1-e36d28eddc97122f95d95077ced1f193 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-b4bp1-e36d28eddc97122f95d95077ced1f193 av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-18  el_after_av_hr  el_before_av_textblock  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Three different topologies<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n<section  class='av_textblock_section av-l8lg3s76-53-2256c3ea3b13b7b5512f88f2c22cab94 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><div class=\"BrdtekstFutura\">&#8211; <strong>Feed forward, feedback and hybrid<\/strong> &#8211;<\/div>\n<div class=\"BrdtekstFutura\">While the basic ANC concept is the same, it can be implemented in three different ways in earphones\/headphones. Each principle has advantages as well as disadvantages as described below:<\/div>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lgent3-52-4b1de2ba4bb04f99d30fbedbd6f02aa1\">\n#top .hr.hr-invisible.av-l8lgent3-52-4b1de2ba4bb04f99d30fbedbd6f02aa1{\nheight:50px;\n}\n<\/style>\n<div  class='hr av-l8lgent3-52-4b1de2ba4bb04f99d30fbedbd6f02aa1 hr-invisible  avia-builder-el-20  el_after_av_textblock  el_before_av_one_third '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-11yvf7-84bea2454231ca29b5c23ba1d8f26325\">\n.flex_column.av-11yvf7-84bea2454231ca29b5c23ba1d8f26325{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-11yvf7-84bea2454231ca29b5c23ba1d8f26325 av_one_third  avia-builder-el-21  el_after_av_hr  el_before_av_one_third  first flex_column_div av-animated-generic bottom-to-top av-zero-column-padding  '     ><p><article  class='iconbox iconbox_top av-l8lgcxbf-b6053e923686fc6d6c2591ca3217f349  avia-builder-el-22  el_before_av_image  avia-builder-el-first  main_color'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconbox_content\"><header class=\"entry-content-header\" aria-label=\"Icon: Feed-forward ANC\"><a href='#1' title='Feed-forward ANC' aria-label='Feed-forward ANC'  class='iconbox_icon heading-color avia-iconfont avia-font-entypo-fontello' data-av_icon='\ue873' data-av_iconfont='entypo-fontello' title=\"Feed-forward ANC\" desc=\"Feed-forward ANC\" ><\/a><h3 class='iconbox_content_title '  itemprop=\"headline\" ><a href='#1' title='Feed-forward ANC' >Feed-forward ANC<\/a><\/h3><\/header><div class='iconbox_content_container '  itemprop=\"text\" ><\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-110ssv-3514b3030c5931cd3d0ee37ef7b692f1\">\n.avia-image-container.av-110ssv-3514b3030c5931cd3d0ee37ef7b692f1 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-110ssv-3514b3030c5931cd3d0ee37ef7b692f1 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-110ssv-3514b3030c5931cd3d0ee37ef7b692f1 av-styling-no-styling av-img-linked avia-align-center  avia-builder-el-23  el_after_av_icon_box  avia-builder-el-last '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image- avia-img-lazy-loading-not- avia_image ' src=\"http:\/\/test.kriesi.at\/construction\/wp-content\/uploads\/sites\/7\/2015\/10\/scale-ruler-on-blueprints-845x321.jpg\" alt='' title=''   itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ylzez-b7c71da90d7b5ecfb248745999fe74dd\">\n.flex_column.av-ylzez-b7c71da90d7b5ecfb248745999fe74dd{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-ylzez-b7c71da90d7b5ecfb248745999fe74dd av_one_third  avia-builder-el-24  el_after_av_one_third  el_before_av_one_third  flex_column_div av-animated-generic bottom-to-top av-zero-column-padding  '     ><p><article  class='iconbox iconbox_top av-l8lgcxbf-50-d05a075fb2e34bdcf5fef18510d66471  avia-builder-el-25  el_before_av_image  avia-builder-el-first  main_color'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconbox_content\"><header class=\"entry-content-header\" aria-label=\"Icon: Feedback ANC\"><a href='#2' title='Feedback ANC' aria-label='Feedback ANC'  class='iconbox_icon heading-color avia-iconfont avia-font-entypo-fontello' data-av_icon='\ue873' data-av_iconfont='entypo-fontello' title=\"Feedback ANC\" desc=\"Feedback ANC\" ><\/a><h3 class='iconbox_content_title '  itemprop=\"headline\" ><a href='#2' title='Feedback ANC' >Feedback ANC<\/a><\/h3><\/header><div class='iconbox_content_container '  itemprop=\"text\" ><\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-yi5u7-235a62ec03082a0067e2331aaecf6f2f\">\n.avia-image-container.av-yi5u7-235a62ec03082a0067e2331aaecf6f2f img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-yi5u7-235a62ec03082a0067e2331aaecf6f2f .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-yi5u7-235a62ec03082a0067e2331aaecf6f2f av-styling-no-styling av-img-linked avia-align-center  avia-builder-el-26  el_after_av_icon_box  avia-builder-el-last '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image- avia-img-lazy-loading-not- avia_image ' src=\"http:\/\/test.kriesi.at\/construction\/wp-content\/uploads\/sites\/7\/2015\/10\/construction-site-machines-845x321.jpg\" alt='' title=''   itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-36fov-55b3b9cfb40648e0e5bb5de72dcb7c5c\">\n.flex_column.av-36fov-55b3b9cfb40648e0e5bb5de72dcb7c5c{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-36fov-55b3b9cfb40648e0e5bb5de72dcb7c5c av_one_third  avia-builder-el-27  el_after_av_one_third  avia-builder-el-last  flex_column_div av-animated-generic bottom-to-top av-zero-column-padding  '     ><p><article  class='iconbox iconbox_top av-l8lgcxbf-49-12e19e4db222c7924793fd1d9a75533e  avia-builder-el-28  el_before_av_image  avia-builder-el-first  main_color'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconbox_content\"><header class=\"entry-content-header\" aria-label=\"Icon: Hybrid ANC\"><a href='#3' title='Hybrid ANC' aria-label='Hybrid ANC'  class='iconbox_icon heading-color avia-iconfont avia-font-entypo-fontello' data-av_icon='\ue873' data-av_iconfont='entypo-fontello' title=\"Hybrid ANC\" desc=\"Hybrid ANC\" ><\/a><h3 class='iconbox_content_title '  itemprop=\"headline\" ><a href='#3' title='Hybrid ANC' >Hybrid ANC<\/a><\/h3><\/header><div class='iconbox_content_container '  itemprop=\"text\" ><\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-v8nlb-6d5b97f12ad402ba2f365f3faa4de725\">\n.avia-image-container.av-v8nlb-6d5b97f12ad402ba2f365f3faa4de725 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-v8nlb-6d5b97f12ad402ba2f365f3faa4de725 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-v8nlb-6d5b97f12ad402ba2f365f3faa4de725 av-styling-no-styling av-img-linked avia-align-center  avia-builder-el-29  el_after_av_icon_box  avia-builder-el-last '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image- avia-img-lazy-loading-not- avia_image ' src=\"http:\/\/test.kriesi.at\/construction\/wp-content\/uploads\/sites\/7\/2015\/10\/cropped-hand-of-a-carpenter-845x321.jpg\" alt='' title=''   itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><\/p><\/div>\n\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='1'  class='avia-section av-akx4r-baebccccb980ee808303f879b905104f main_color avia-section-large avia-no-border-styling  avia-builder-el-30  el_after_av_section  el_before_av_hr  avia-bg-style-scroll av-minimum-height av-minimum-height-custom av-height-custom  container_wrap sidebar_right'   data-av_minimum_height_px='500'><div class='container av-section-cont-open' style='height:500px'><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-557'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-24106616e0a3dd5d25df1c2ae9f3e48d\">\n#top .flex_column.av-fszce-24106616e0a3dd5d25df1c2ae9f3e48d{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-fszce-24106616e0a3dd5d25df1c2ae9f3e48d{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-fszce-24106616e0a3dd5d25df1c2ae9f3e48d{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-24106616e0a3dd5d25df1c2ae9f3e48d av_one_half  avia-builder-el-31  el_before_av_one_half  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ldydktbg-7568d77b281aa73ac14f7be9a42433bc\">\n#top .av-special-heading.av-ldydktbg-7568d77b281aa73ac14f7be9a42433bc{\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-ldydktbg-7568d77b281aa73ac14f7be9a42433bc .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-ldydktbg-7568d77b281aa73ac14f7be9a42433bc .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-ldydktbg-7568d77b281aa73ac14f7be9a42433bc .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-ldydktbg-7568d77b281aa73ac14f7be9a42433bc .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-ldydktbg-7568d77b281aa73ac14f7be9a42433bc .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-ldydktbg-7568d77b281aa73ac14f7be9a42433bc .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-ldydktbg-7568d77b281aa73ac14f7be9a42433bc av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-32  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Feedforward<\/h2><div class='av_custom_color av-subheading av-subheading_below'><p>(microphone outside earcup)<\/p>\n<\/div><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-l833e7ea-dc859c8958fca18fc161bfe8a37a3212 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><div class=\"BrdtekstFutura\">In the feed-forward design the microphone is placed outside the ear cup. Here the microphone detects the noise before the listener does.<\/div>\n<div class=\"BrdtekstFutura\"><\/div>\n<div class=\"BrdtekstFutura\">The ANC circuit processes the noise and makes the anti-noise signal before sending it to the earphone.<\/div>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lgent3-51-79cc2d6b81198f783e75ed79fcc8c09f\">\n#top .hr.hr-invisible.av-l8lgent3-51-79cc2d6b81198f783e75ed79fcc8c09f{\nheight:10px;\n}\n<\/style>\n<div  class='hr av-l8lgent3-51-79cc2d6b81198f783e75ed79fcc8c09f hr-invisible  avia-builder-el-34  el_after_av_textblock  el_before_av_heading '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ldydkw77-e2c420c35afd0eb2cadc82646526a23c\">\n#top .av-special-heading.av-ldydkw77-e2c420c35afd0eb2cadc82646526a23c{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-ldydkw77-e2c420c35afd0eb2cadc82646526a23c .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-ldydkw77-e2c420c35afd0eb2cadc82646526a23c .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-ldydkw77-e2c420c35afd0eb2cadc82646526a23c av-special-heading-h3  avia-builder-el-35  el_after_av_hr  el_before_av_iconlist '><h3 class='av-special-heading-tag '  itemprop=\"headline\"  >Advantage<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lgsoyh-5251e00d3a2a3ec59f0d4c52f25344f3\">\n#top .avia-icon-list-container.av-l8lgsoyh-5251e00d3a2a3ec59f0d4c52f25344f3 .iconlist_icon{\ncolor:#ffffff;\nbackground-color:#702423;\n}\n#top .avia-icon-list-container.av-l8lgsoyh-5251e00d3a2a3ec59f0d4c52f25344f3 .iconlist_icon svg:first-child{\nstroke:#ffffff;\nfill:#ffffff;\n}\n.avia-icon-list-container.av-l8lgsoyh-5251e00d3a2a3ec59f0d4c52f25344f3 .iconlist_content{\ncolor:#101010;\n}\n<\/style>\n<div  class='avia-icon-list-container av-l8lgsoyh-5251e00d3a2a3ec59f0d4c52f25344f3  avia-builder-el-36  el_after_av_heading  el_before_av_heading '><ul class='avia-icon-list avia_animate_when_almost_visible avia-icon-list-left av-iconlist-small av-l8lgsoyh-5251e00d3a2a3ec59f0d4c52f25344f3 avia-iconlist-animate'>\n<li><div class='iconlist_icon av-13ypn1-c9b3fac8750066e39a9c12e107c8b07a avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue816' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>The microphone picks up the noise early, so more time is available to respond and generate the anti-noise. This makes it possible to reduce noise at frequencies up to 1-2kHz under ideal conditions.<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-ze0ml-a52e296e0d10dac79b8aca826ac939fb avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue816' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>There will be no stability problems, because no feedback loop is involved.<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-oywrp-564750a535e5ddf3d613ca415d271bde avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue816' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>The Feedforward microphone can be used for &#8220;outside listening&#8221; as extra feature.<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<\/ul><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ldydkybi-e27197a44fc1fb4e2238ed0e7ed38cae\">\n#top .av-special-heading.av-ldydkybi-e27197a44fc1fb4e2238ed0e7ed38cae{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-ldydkybi-e27197a44fc1fb4e2238ed0e7ed38cae .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-ldydkybi-e27197a44fc1fb4e2238ed0e7ed38cae .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-ldydkybi-e27197a44fc1fb4e2238ed0e7ed38cae av-special-heading-h3  avia-builder-el-37  el_after_av_iconlist  el_before_av_iconlist '><h3 class='av-special-heading-tag '  itemprop=\"headline\"  >Disadvantage<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lgsoyh-44-c113a721f5b55e6272d4ab410c58fc34\">\n#top .avia-icon-list-container.av-l8lgsoyh-44-c113a721f5b55e6272d4ab410c58fc34 .iconlist_icon{\ncolor:#ffffff;\nbackground-color:#702423;\n}\n#top .avia-icon-list-container.av-l8lgsoyh-44-c113a721f5b55e6272d4ab410c58fc34 .iconlist_icon svg:first-child{\nstroke:#ffffff;\nfill:#ffffff;\n}\n.avia-icon-list-container.av-l8lgsoyh-44-c113a721f5b55e6272d4ab410c58fc34 .iconlist_content{\ncolor:#101010;\n}\n<\/style>\n<div  class='avia-icon-list-container av-l8lgsoyh-44-c113a721f5b55e6272d4ab410c58fc34  avia-builder-el-38  el_after_av_heading  avia-builder-el-last '><ul class='avia-icon-list avia_animate_when_almost_visible avia-icon-list-left av-iconlist-small av-l8lgsoyh-44-c113a721f5b55e6272d4ab410c58fc34 avia-iconlist-animate'>\n<li><div class='iconlist_icon av-hqnxx-1742d6311664dc71dbefd31f22e5ad89 avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue819' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>There are no ways to self-correct the performance since once the noise is picked up, the \u201cwork is done\u201d. For example if the listener places the earphone incorrectly in the ear or if the noise is coming in at an unexpected angle, this could lead to an amplification of the noise.<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<\/ul><\/div><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-biw9y-4a8b7410df4b6ae7567716bd08ff6f0c\">\n#top .flex_column.av-biw9y-4a8b7410df4b6ae7567716bd08ff6f0c{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-biw9y-4a8b7410df4b6ae7567716bd08ff6f0c{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-biw9y-4a8b7410df4b6ae7567716bd08ff6f0c{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-biw9y-4a8b7410df4b6ae7567716bd08ff6f0c av_one_half  avia-builder-el-39  el_after_av_one_half  avia-builder-el-last  flex_column_div av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833dvw1-85cc8a3c6ac5fa34352d4e2434b8b8fd\">\n.avia-image-container.av-l833dvw1-85cc8a3c6ac5fa34352d4e2434b8b8fd img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-85cc8a3c6ac5fa34352d4e2434b8b8fd .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-85cc8a3c6ac5fa34352d4e2434b8b8fd av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-40  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-547 avia-img-lazy-loading-not-547 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/feed-forward_design_the_microphone.png\" alt='' title='feed-forward_design_the_microphone'  height=\"1490\" width=\"1692\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/feed-forward_design_the_microphone.png 1692w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/feed-forward_design_the_microphone-300x264.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/feed-forward_design_the_microphone-1030x907.png 1030w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/feed-forward_design_the_microphone-768x676.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/feed-forward_design_the_microphone-1536x1353.png 1536w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/feed-forward_design_the_microphone-1500x1321.png 1500w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/feed-forward_design_the_microphone-705x621.png 705w\" sizes=\"(max-width: 1692px) 100vw, 1692px\" \/><\/div><\/div><\/div><\/div>\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='after_section_4'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-557'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ldu7yu78-78eacb223cfb5cecb81cc019a23988c7\">\n#top .hr.av-ldu7yu78-78eacb223cfb5cecb81cc019a23988c7{\nmargin-top:10px;\nmargin-bottom:10px;\n}\n.hr.av-ldu7yu78-78eacb223cfb5cecb81cc019a23988c7 .hr-inner{\nwidth:500;\nborder-color:#702423;\n}\n<\/style>\n<div  class='hr av-ldu7yu78-78eacb223cfb5cecb81cc019a23988c7 hr-custom  avia-builder-el-41  el_after_av_section  el_before_av_section  avia-builder-el-no-sibling  hr-center hr-icon-no'><span class='hr-inner inner-border-av-border-thin'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='2'  class='avia-section av-akx4r-48-51b78283b9ec820204221056c1a4d7d9 main_color avia-section-large avia-no-border-styling  avia-builder-el-42  el_after_av_hr  el_before_av_hr  avia-bg-style-scroll av-minimum-height av-minimum-height-custom av-height-custom  container_wrap sidebar_right'   data-av_minimum_height_px='500'><div class='container av-section-cont-open' style='height:500px'><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-557'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-biw9y-42-932371af862a4288acc537cb5742379d\">\n#top .flex_column.av-biw9y-42-932371af862a4288acc537cb5742379d{\nmargin-bottom:0px;\n}\n.flex_column.av-biw9y-42-932371af862a4288acc537cb5742379d{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-biw9y-42-932371af862a4288acc537cb5742379d{\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-biw9y-42-932371af862a4288acc537cb5742379d av_one_half  avia-builder-el-43  el_before_av_one_half  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833dvw1-41-f1be279081641ebdd40d84ca04a169c5\">\n.avia-image-container.av-l833dvw1-41-f1be279081641ebdd40d84ca04a169c5 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-41-f1be279081641ebdd40d84ca04a169c5 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-41-f1be279081641ebdd40d84ca04a169c5 av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-44  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-548 avia-img-lazy-loading-not-548 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/feedback_design_ANC@2x.png\" alt='' title='feedback_design_ANC@2x'  height=\"725\" width=\"856\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/feedback_design_ANC@2x.png 856w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/feedback_design_ANC@2x-300x254.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/feedback_design_ANC@2x-768x650.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/feedback_design_ANC@2x-705x597.png 705w\" sizes=\"(max-width: 856px) 100vw, 856px\" \/><\/div><\/div><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-47-b59cbc7fdad293e8219a7c9ae94fec9d\">\n#top .flex_column.av-fszce-47-b59cbc7fdad293e8219a7c9ae94fec9d{\nmargin-bottom:0px;\n}\n.flex_column.av-fszce-47-b59cbc7fdad293e8219a7c9ae94fec9d{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-fszce-47-b59cbc7fdad293e8219a7c9ae94fec9d{\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-47-b59cbc7fdad293e8219a7c9ae94fec9d av_one_half  avia-builder-el-45  el_after_av_one_half  avia-builder-el-last  flex_column_div av-zero-column-padding  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-10qfol-0f30ad8043f05840021390df01ed8c0b\">\n#top .av-special-heading.av-10qfol-0f30ad8043f05840021390df01ed8c0b{\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-10qfol-0f30ad8043f05840021390df01ed8c0b .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-10qfol-0f30ad8043f05840021390df01ed8c0b .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-10qfol-0f30ad8043f05840021390df01ed8c0b .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-10qfol-0f30ad8043f05840021390df01ed8c0b .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-10qfol-0f30ad8043f05840021390df01ed8c0b .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-10qfol-0f30ad8043f05840021390df01ed8c0b .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-10qfol-0f30ad8043f05840021390df01ed8c0b av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-46  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Feedback<\/h2><div class='av_custom_color av-subheading av-subheading_below'><p>(microphone inside earcup)<\/p>\n<\/div><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-l833e7ea-46-e7959dbf74193e448e1953430ee26d8c '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>In the feedback design, the microphone is placed inside the ear cup and in front of the speaker \u201chearing\u201d the resulting signal in exactly the same way as the listener does.<\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lgent3-45-e61914c4647cd55df87fe5247060c7ff\">\n#top .hr.hr-invisible.av-l8lgent3-45-e61914c4647cd55df87fe5247060c7ff{\nheight:10px;\n}\n<\/style>\n<div  class='hr av-l8lgent3-45-e61914c4647cd55df87fe5247060c7ff hr-invisible  avia-builder-el-48  el_after_av_textblock  el_before_av_heading '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-w97o5-f8d5d79bbd328f0de6995b5e4b998f41\">\n#top .av-special-heading.av-w97o5-f8d5d79bbd328f0de6995b5e4b998f41{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-w97o5-f8d5d79bbd328f0de6995b5e4b998f41 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-w97o5-f8d5d79bbd328f0de6995b5e4b998f41 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-w97o5-f8d5d79bbd328f0de6995b5e4b998f41 av-special-heading-h3  avia-builder-el-49  el_after_av_hr  el_before_av_iconlist '><h3 class='av-special-heading-tag '  itemprop=\"headline\"  >Advantage<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lgsoyh-43-63720a67e61a64b0acf428c6f4ba074a\">\n#top .avia-icon-list-container.av-l8lgsoyh-43-63720a67e61a64b0acf428c6f4ba074a .iconlist_icon{\ncolor:#ffffff;\nbackground-color:#702423;\n}\n#top .avia-icon-list-container.av-l8lgsoyh-43-63720a67e61a64b0acf428c6f4ba074a .iconlist_icon svg:first-child{\nstroke:#ffffff;\nfill:#ffffff;\n}\n.avia-icon-list-container.av-l8lgsoyh-43-63720a67e61a64b0acf428c6f4ba074a .iconlist_content{\ncolor:#101010;\n}\n<\/style>\n<div  class='avia-icon-list-container av-l8lgsoyh-43-63720a67e61a64b0acf428c6f4ba074a  avia-builder-el-50  el_after_av_heading  el_before_av_heading '><ul class='avia-icon-list avia_animate_when_almost_visible avia-icon-list-left av-iconlist-small av-l8lgsoyh-43-63720a67e61a64b0acf428c6f4ba074a avia-iconlist-animate'>\n<li><div class='iconlist_icon av-qxrp1-b9a014aba7eaff1129c46367c6934cfa avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue816' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>Because the microphone \u201chears\u201d exactly what the listener hears, the feedback ANC can better adapt to any incoming variations and correct the signal. Even if the earphone is worn incorrectly, the ANC performance will still work to a certain degree.<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<\/ul><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-t4nz1-49a7c7184caf2c9e995e46807217a1be\">\n#top .av-special-heading.av-t4nz1-49a7c7184caf2c9e995e46807217a1be{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-t4nz1-49a7c7184caf2c9e995e46807217a1be .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-t4nz1-49a7c7184caf2c9e995e46807217a1be .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-t4nz1-49a7c7184caf2c9e995e46807217a1be av-special-heading-h3  avia-builder-el-51  el_after_av_iconlist  el_before_av_iconlist '><h3 class='av-special-heading-tag '  itemprop=\"headline\"  >Disadvantage<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lgsoyh-33-b90614cab4277d5063b024baa1613ef7\">\n#top .avia-icon-list-container.av-l8lgsoyh-33-b90614cab4277d5063b024baa1613ef7 .iconlist_icon{\ncolor:#ffffff;\nbackground-color:#702423;\n}\n#top .avia-icon-list-container.av-l8lgsoyh-33-b90614cab4277d5063b024baa1613ef7 .iconlist_icon svg:first-child{\nstroke:#ffffff;\nfill:#ffffff;\n}\n.avia-icon-list-container.av-l8lgsoyh-33-b90614cab4277d5063b024baa1613ef7 .iconlist_content{\ncolor:#101010;\n}\n<\/style>\n<div  class='avia-icon-list-container av-l8lgsoyh-33-b90614cab4277d5063b024baa1613ef7  avia-builder-el-52  el_after_av_heading  avia-builder-el-last '><ul class='avia-icon-list avia_animate_when_almost_visible avia-icon-list-left av-iconlist-small av-l8lgsoyh-33-b90614cab4277d5063b024baa1613ef7 avia-iconlist-animate'>\n<li><div class='iconlist_icon av-fqbrx-399ec04673eb4f7fd50531921d741dd2 avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue819' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>The design cannot handle higher frequencies as well as the feed-forward ANC. Also, this method treats incoming music\/speech together with the noise with the risk of filtering the low-frequency part of the music\/speech, resulting in a lower quality sound reproduction.<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-6wsg5-b974b3514cf1662ceed2d9aae2769ba9 avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue819' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>Risk of instability (oscillation) due to feedback loop.<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<\/ul><\/div><\/p><\/div>\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='after_section_5'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-557'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ldu7yu78-40-415deb1a6f94227f976d06defc1301bf\">\n#top .hr.av-ldu7yu78-40-415deb1a6f94227f976d06defc1301bf{\nmargin-top:10px;\nmargin-bottom:10px;\n}\n.hr.av-ldu7yu78-40-415deb1a6f94227f976d06defc1301bf .hr-inner{\nwidth:500;\nborder-color:#702423;\n}\n<\/style>\n<div  class='hr av-ldu7yu78-40-415deb1a6f94227f976d06defc1301bf hr-custom  avia-builder-el-53  el_after_av_section  el_before_av_section  avia-builder-el-no-sibling  hr-center hr-icon-no'><span class='hr-inner inner-border-av-border-thin'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='3'  class='avia-section av-akx4r-39-93517f1d93512976b498daad3a9e862c main_color avia-section-large avia-no-border-styling  avia-builder-el-54  el_after_av_hr  el_before_av_section  avia-bg-style-scroll av-minimum-height av-minimum-height-custom av-height-custom  container_wrap sidebar_right'   data-av_minimum_height_px='500'><div class='container av-section-cont-open' style='height:500px'><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-557'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-36-9e0c04e65b0e2df4377c7ce6579ce67b\">\n#top .flex_column.av-fszce-36-9e0c04e65b0e2df4377c7ce6579ce67b{\nmargin-top:0px;\nmargin-bottom:0px;\n}\n.flex_column.av-fszce-36-9e0c04e65b0e2df4377c7ce6579ce67b{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-fszce-36-9e0c04e65b0e2df4377c7ce6579ce67b{\nmargin-top:0px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-36-9e0c04e65b0e2df4377c7ce6579ce67b av_one_half  avia-builder-el-55  el_before_av_one_half  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-naj5p-267807d288a00f3440847703c400816f\">\n#top .av-special-heading.av-naj5p-267807d288a00f3440847703c400816f{\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-naj5p-267807d288a00f3440847703c400816f .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-naj5p-267807d288a00f3440847703c400816f .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-naj5p-267807d288a00f3440847703c400816f .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-naj5p-267807d288a00f3440847703c400816f .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-naj5p-267807d288a00f3440847703c400816f .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-naj5p-267807d288a00f3440847703c400816f .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-naj5p-267807d288a00f3440847703c400816f av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-56  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Hybrid<\/h2><div class='av_custom_color av-subheading av-subheading_below'><p>(microphone inside and outside earcup)<\/p>\n<\/div><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-l833e7ea-35-9dff1b07b3060114eea2d0a9b9d78929 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>The Hybrid ANC design takes the best of both worlds in combining the feed-forward and the feedback ANC having microphones placed both outside and inside the ear cup.<\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lgent3-34-a7e98e3463ebeccc48c888b8cd2fc7df\">\n#top .hr.hr-invisible.av-l8lgent3-34-a7e98e3463ebeccc48c888b8cd2fc7df{\nheight:10px;\n}\n<\/style>\n<div  class='hr av-l8lgent3-34-a7e98e3463ebeccc48c888b8cd2fc7df hr-invisible  avia-builder-el-58  el_after_av_textblock  el_before_av_heading '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-dkxid-bb51e30a8908e8397d09c24d48fbc055\">\n#top .av-special-heading.av-dkxid-bb51e30a8908e8397d09c24d48fbc055{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-dkxid-bb51e30a8908e8397d09c24d48fbc055 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-dkxid-bb51e30a8908e8397d09c24d48fbc055 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-dkxid-bb51e30a8908e8397d09c24d48fbc055 av-special-heading-h3  avia-builder-el-59  el_after_av_hr  el_before_av_iconlist '><h3 class='av-special-heading-tag '  itemprop=\"headline\"  >Advantage<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lgsoyh-32-b60b30c487000526f5e6d9163c8f2d71\">\n#top .avia-icon-list-container.av-l8lgsoyh-32-b60b30c487000526f5e6d9163c8f2d71 .iconlist_icon{\ncolor:#ffffff;\nbackground-color:#702423;\n}\n#top .avia-icon-list-container.av-l8lgsoyh-32-b60b30c487000526f5e6d9163c8f2d71 .iconlist_icon svg:first-child{\nstroke:#ffffff;\nfill:#ffffff;\n}\n.avia-icon-list-container.av-l8lgsoyh-32-b60b30c487000526f5e6d9163c8f2d71 .iconlist_content{\ncolor:#101010;\n}\n<\/style>\n<div  class='avia-icon-list-container av-l8lgsoyh-32-b60b30c487000526f5e6d9163c8f2d71  avia-builder-el-60  el_after_av_heading  el_before_av_heading '><ul class='avia-icon-list avia_animate_when_almost_visible avia-icon-list-left av-iconlist-small av-l8lgsoyh-32-b60b30c487000526f5e6d9163c8f2d71 avia-iconlist-animate'>\n<li><div class='iconlist_icon av-ro5jh-c827ecc85877883d9d165cd1ea34c623 avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue816' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>It gets the best of both worlds by having capabilities of suppressing noise at a broader frequency band, adapt to and correct errors and is less sensitive to how the person wears the earphone.<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-ikoyl-5eb6df0543737cd4b33727f49ee4889a avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue816' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>The FF and FB performances in the Hybrid solution are totally independent and can therefore be turned on and off individually if desired\/necessary.<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<\/ul><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-95egd-7cb84b3aaf52827f4b3b329f0f2d5b82\">\n#top .av-special-heading.av-95egd-7cb84b3aaf52827f4b3b329f0f2d5b82{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-95egd-7cb84b3aaf52827f4b3b329f0f2d5b82 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-95egd-7cb84b3aaf52827f4b3b329f0f2d5b82 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-95egd-7cb84b3aaf52827f4b3b329f0f2d5b82 av-special-heading-h3  avia-builder-el-61  el_after_av_iconlist  el_before_av_iconlist '><h3 class='av-special-heading-tag '  itemprop=\"headline\"  >Disadvantage<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lgsoyh-27-908799a229340605a53c944408b0c429\">\n#top .avia-icon-list-container.av-l8lgsoyh-27-908799a229340605a53c944408b0c429 .iconlist_icon{\ncolor:#ffffff;\nbackground-color:#702423;\n}\n#top .avia-icon-list-container.av-l8lgsoyh-27-908799a229340605a53c944408b0c429 .iconlist_icon svg:first-child{\nstroke:#ffffff;\nfill:#ffffff;\n}\n.avia-icon-list-container.av-l8lgsoyh-27-908799a229340605a53c944408b0c429 .iconlist_content{\ncolor:#101010;\n}\n<\/style>\n<div  class='avia-icon-list-container av-l8lgsoyh-27-908799a229340605a53c944408b0c429  avia-builder-el-62  el_after_av_heading  avia-builder-el-last '><ul class='avia-icon-list avia_animate_when_almost_visible avia-icon-list-left av-iconlist-small av-l8lgsoyh-27-908799a229340605a53c944408b0c429 avia-iconlist-animate'>\n<li><div class='iconlist_icon av-85h8t-94838b2e506413d1da80a3241d7ee71d avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue819' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>Having two or more microphones requires more processing power and expertise, and because more microphones will generate more internal noise, expensive high-performance microphones are required. So all in all, this Hybrid ANC approach will be more expensive. A schematic model for the Hybrid ANC design is shown in Fig.5<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<\/ul><\/div><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-biw9y-38-be982fad841c45d897e723e07a359c65\">\n#top .flex_column.av-biw9y-38-be982fad841c45d897e723e07a359c65{\nmargin-top:0px;\nmargin-bottom:0px;\n}\n.flex_column.av-biw9y-38-be982fad841c45d897e723e07a359c65{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-biw9y-38-be982fad841c45d897e723e07a359c65{\nmargin-top:0px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-biw9y-38-be982fad841c45d897e723e07a359c65 av_one_half  avia-builder-el-63  el_after_av_one_half  el_before_av_hr  flex_column_div av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833dvw1-37-dd7cc8a9edc01d0024a4c1294e1fe73d\">\n.avia-image-container.av-l833dvw1-37-dd7cc8a9edc01d0024a4c1294e1fe73d img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-37-dd7cc8a9edc01d0024a4c1294e1fe73d .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-37-dd7cc8a9edc01d0024a4c1294e1fe73d av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-64  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-550 avia-img-lazy-loading-not-550 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Hybrid_ANC_design@2x.png\" alt='' title='Hybrid_ANC_design@2x'  height=\"702\" width=\"850\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Hybrid_ANC_design@2x.png 850w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Hybrid_ANC_design@2x-300x248.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Hybrid_ANC_design@2x-768x634.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Hybrid_ANC_design@2x-705x582.png 705w\" sizes=\"(max-width: 850px) 100vw, 850px\" \/><\/div><\/div><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ldu7yu78-31-1981c7a4086b56a86c72704bf1f0c347\">\n#top .hr.av-ldu7yu78-31-1981c7a4086b56a86c72704bf1f0c347{\nmargin-top:10px;\nmargin-bottom:10px;\n}\n.hr.av-ldu7yu78-31-1981c7a4086b56a86c72704bf1f0c347 .hr-inner{\nwidth:500;\nborder-color:#702423;\n}\n<\/style>\n<div  class='hr av-ldu7yu78-31-1981c7a4086b56a86c72704bf1f0c347 hr-custom  avia-builder-el-65  el_after_av_one_half  el_before_av_image  hr-center hr-icon-no'><span class='hr-inner inner-border-av-border-thin'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833dvw1-24-aff2bb146492b9bf6b0e9769283e762c\">\n.avia-image-container.av-l833dvw1-24-aff2bb146492b9bf6b0e9769283e762c img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-24-aff2bb146492b9bf6b0e9769283e762c .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-24-aff2bb146492b9bf6b0e9769283e762c av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-66  el_after_av_hr  avia-builder-el-last '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-549 avia-img-lazy-loading-not-549 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Hybrid_ANC_design_1@2x.png\" alt='' title='Hybrid_ANC_design_1@2x'  height=\"558\" width=\"1056\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Hybrid_ANC_design_1@2x.png 1056w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Hybrid_ANC_design_1@2x-300x159.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Hybrid_ANC_design_1@2x-1030x544.png 1030w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Hybrid_ANC_design_1@2x-768x406.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Hybrid_ANC_design_1@2x-710x375.png 710w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Hybrid_ANC_design_1@2x-705x373.png 705w\" sizes=\"(max-width: 1056px) 100vw, 1056px\" \/><\/div><\/div><\/div>\n\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-16tdaf-55-7cb773ac792f771aa89edfac500d66e8\">\n.avia-section.av-16tdaf-55-7cb773ac792f771aa89edfac500d66e8{\nbackground-color:#f9f9f9;\nbackground-image:unset;\n}\n<\/style>\n<div id='av_section_7'  class='avia-section av-16tdaf-55-7cb773ac792f771aa89edfac500d66e8 main_color avia-section-default avia-no-border-styling  avia-builder-el-67  el_after_av_section  el_before_av_section  avia-bg-style-parallax container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-557'><div class='entry-content-wrapper clearfix'>\n<div class='flex_column_table av-15vtvr-54-e173728b045179014a8b82a9246d266a sc-av_one_full av-equal-height-column-flextable'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-15vtvr-54-e173728b045179014a8b82a9246d266a\">\n.flex_column.av-15vtvr-54-e173728b045179014a8b82a9246d266a{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-15vtvr-54-e173728b045179014a8b82a9246d266a av_one_full  avia-builder-el-68  el_before_av_textblock  avia-builder-el-first  first flex_column_table_cell av-equal-height-column av-align-middle av-animated-generic left-to-right av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ldydlmew-ee2121e5d4ab564fff556a5915816de3\">\n#top .av-special-heading.av-ldydlmew-ee2121e5d4ab564fff556a5915816de3{\nmargin:80px 0 0 0;\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-ldydlmew-ee2121e5d4ab564fff556a5915816de3 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-ldydlmew-ee2121e5d4ab564fff556a5915816de3 .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-ldydlmew-ee2121e5d4ab564fff556a5915816de3 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-ldydlmew-ee2121e5d4ab564fff556a5915816de3 .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-ldydlmew-ee2121e5d4ab564fff556a5915816de3 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-ldydlmew-ee2121e5d4ab564fff556a5915816de3 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-ldydlmew-ee2121e5d4ab564fff556a5915816de3 av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-69  avia-builder-el-no-sibling  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >LIMITATIONS TO THE ANC PERFORMANCE<\/h2><div class='av_custom_color av-subheading av-subheading_below'><p>&#8211; Ideal theory meets world limitations<\/p>\n<\/div><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833e7ea-28-751e7704ccb0ee676558597359b9910c\">\n#top .av_textblock_section.av-l833e7ea-28-751e7704ccb0ee676558597359b9910c .avia_textblock{\ncolor:#101010;\n}\n<\/style>\n<section  class='av_textblock_section av-l833e7ea-28-751e7704ccb0ee676558597359b9910c '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><p>The above mentioned ANC principles would work in a very broad frequency range if all conditions were ideal. In practice there are many factors limiting the ANC performance at higher frequencies.<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-29-9b4e4a13ae277ccfd7119abe2f87377a\">\n.flex_column.av-fszce-29-9b4e4a13ae277ccfd7119abe2f87377a{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-29-9b4e4a13ae277ccfd7119abe2f87377a av_one_half  avia-builder-el-71  el_after_av_textblock  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-f2n5h-69143ce30e5b0e30a51ec0dac6910929\">\n#top .av-special-heading.av-f2n5h-69143ce30e5b0e30a51ec0dac6910929{\npadding-bottom:10px;\ncolor:#702423;\n}\nbody .av-special-heading.av-f2n5h-69143ce30e5b0e30a51ec0dac6910929 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-f2n5h-69143ce30e5b0e30a51ec0dac6910929 .special-heading-inner-border{\nborder-color:#702423;\n}\n.av-special-heading.av-f2n5h-69143ce30e5b0e30a51ec0dac6910929 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-f2n5h-69143ce30e5b0e30a51ec0dac6910929 av-special-heading-h3 custom-color-heading  avia-builder-el-72  el_before_av_textblock  avia-builder-el-first '><h3 class='av-special-heading-tag '  itemprop=\"headline\"  >Delay, digital domain<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833e7ea-22-881ec226f9cebbf4a84628891ec5d9ac\">\n#top .av_textblock_section.av-l833e7ea-22-881ec226f9cebbf4a84628891ec5d9ac .avia_textblock{\ncolor:#101010;\n}\n<\/style>\n<section  class='av_textblock_section av-l833e7ea-22-881ec226f9cebbf4a84628891ec5d9ac '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><div class=\"BrdtekstFutura\">When processing signals in the digital domain, there will be some delay issues, which will disturb the ANC performance. Ideally the processing should be with zero delay, but this is not possible. Such a delay will degrade high-frequency ANC the most due the shorter wavelengths of the signal frequencies involved.<\/div>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lgsoyh-26-6858752031fe36fa26e439ca34057c06\">\n#top .avia-icon-list-container.av-l8lgsoyh-26-6858752031fe36fa26e439ca34057c06 .iconlist_icon{\ncolor:#ffffff;\nbackground-color:#702423;\nborder:1px solid #ffffff;\n}\n#top .avia-icon-list-container.av-l8lgsoyh-26-6858752031fe36fa26e439ca34057c06 .iconlist_icon svg:first-child{\nstroke:#ffffff;\nfill:#ffffff;\n}\n.avia-icon-list-container.av-l8lgsoyh-26-6858752031fe36fa26e439ca34057c06 .iconlist_content{\ncolor:#101010;\n}\n<\/style>\n<div  class='avia-icon-list-container av-l8lgsoyh-26-6858752031fe36fa26e439ca34057c06  avia-builder-el-74  el_after_av_textblock  avia-builder-el-last '><ul class='avia-icon-list avia_animate_when_almost_visible avia-icon-list-left av-iconlist-small av-l8lgsoyh-26-6858752031fe36fa26e439ca34057c06 avia-iconlist-animate'>\n<li><div class='iconlist_icon av-mkg45-16e702e3e6bd1786fe0f362cbdce5cab avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue812' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>Acceptable digital group delay will typically be below 5\u00b5sec.<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-fthz1-cf8792493869b1307918f068bc4eeecc avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue812' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>Acoustic (analog) delay can normally be neglected since it is in the range of 5-10 \u00b5sec which will not not contribute significantly to the total delay.<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<\/ul><\/div><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-21-59d874c7c2d8cc28c88a8ccfbad358ca\">\n.flex_column.av-fszce-21-59d874c7c2d8cc28c88a8ccfbad358ca{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-21-59d874c7c2d8cc28c88a8ccfbad358ca av_one_half  avia-builder-el-75  el_after_av_one_half  el_before_av_hr  flex_column_div av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-b1qbx-f9c67a8adfb88cd2be483349c590ae37\">\n#top .av-special-heading.av-b1qbx-f9c67a8adfb88cd2be483349c590ae37{\npadding-bottom:10px;\ncolor:#702423;\n}\nbody .av-special-heading.av-b1qbx-f9c67a8adfb88cd2be483349c590ae37 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-b1qbx-f9c67a8adfb88cd2be483349c590ae37 .special-heading-inner-border{\nborder-color:#702423;\n}\n.av-special-heading.av-b1qbx-f9c67a8adfb88cd2be483349c590ae37 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-b1qbx-f9c67a8adfb88cd2be483349c590ae37 av-special-heading-h3 custom-color-heading  avia-builder-el-76  el_before_av_textblock  avia-builder-el-first '><h3 class='av-special-heading-tag '  itemprop=\"headline\"  >Analog domain<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833e7ea-20-b2f46dc1fc63c97cd40f7533fe4c4918\">\n#top .av_textblock_section.av-l833e7ea-20-b2f46dc1fc63c97cd40f7533fe4c4918 .avia_textblock{\ncolor:#101010;\n}\n<\/style>\n<section  class='av_textblock_section av-l833e7ea-20-b2f46dc1fc63c97cd40f7533fe4c4918 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><div class=\"BrdtekstFutura\">In the analog domain a significant limiting factor is the variance of the transfer function of the system in the ear of the user. This variance will increase at higher frequencies and course many and rapid phase shifts in the transfer function. Knowing that the basic ANC application is based on adding a noise signal in counter phase, many and rapid phase shifts will of course complicate the task significantly. In fact there is a huge risk at higher frequencies to increase the noise level due to this or even enter an unstable loop finding its own resonance frequency and turning into an oscillator.<\/div>\n<div class=\"BrdtekstFutura\"><\/div>\n<div class=\"BrdtekstFutura\">For these reasons, the ANC performance is often by purpose band limited to around 1.2kHz. This also makes sense since the mechanical structure of the earphone\/headphone gives a solid passive background noise attenuation above 1.2kHz making ANC obsolete over this frequency range.<\/div>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-nrw5p-cad8c6a1cc1752f16ba80ebe865a20bd\">\n#top .hr.hr-invisible.av-nrw5p-cad8c6a1cc1752f16ba80ebe865a20bd{\nheight:50px;\n}\n<\/style>\n<div  class='hr av-nrw5p-cad8c6a1cc1752f16ba80ebe865a20bd hr-invisible  avia-builder-el-78  el_after_av_textblock  el_before_av_textblock '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833e7ea-17-128fac1fe45f8d17abb7d5dcfb2a0de8\">\n#top .av_textblock_section.av-l833e7ea-17-128fac1fe45f8d17abb7d5dcfb2a0de8 .avia_textblock{\ncolor:#101010;\n}\n<\/style>\n<section  class='av_textblock_section av-l833e7ea-17-128fac1fe45f8d17abb7d5dcfb2a0de8 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><h4 class=\"OverskriftH4\">Limitations to the elements in the ANC loop<\/h4>\n<p class=\"BrdtekstFutura\">There are three major elements in the ANC loop:<\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lgsoyh-19-201cc89f55bc9a8d75e0c62a46b6e231\">\n#top .avia-icon-list-container.av-l8lgsoyh-19-201cc89f55bc9a8d75e0c62a46b6e231 .iconlist_icon{\ncolor:#ffffff;\nbackground-color:#702423;\nborder:1px solid #ffffff;\n}\n#top .avia-icon-list-container.av-l8lgsoyh-19-201cc89f55bc9a8d75e0c62a46b6e231 .iconlist_icon svg:first-child{\nstroke:#ffffff;\nfill:#ffffff;\n}\n.avia-icon-list-container.av-l8lgsoyh-19-201cc89f55bc9a8d75e0c62a46b6e231 .iconlist_content{\ncolor:#101010;\n}\n<\/style>\n<div  class='avia-icon-list-container av-l8lgsoyh-19-201cc89f55bc9a8d75e0c62a46b6e231  avia-builder-el-80  el_after_av_textblock  avia-builder-el-last '><ul class='avia-icon-list avia_animate_when_almost_visible avia-icon-list-left av-iconlist-small av-l8lgsoyh-19-201cc89f55bc9a8d75e0c62a46b6e231 avia-iconlist-animate'>\n<li><div class='iconlist_icon av-n7ykd-30fa06d444f155682a47a4e040dcc85b avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue812' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>The microphone(s)<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-gahut-0d2f146c24e842e47ee1b53b6bd0362f avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue812' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>The driver (receiver)<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-8oolp-4e48d8adfac2d99460b3ba6c23f457c1 avia-font-entypo-fontello avia-iconfont avia-font-entypo-fontello'><span class='av-icon-char' data-av_icon='\ue812' data-av_iconfont='entypo-fontello' aria-hidden=\"true\"><\/span><\/div><article class=\"article-icon-entry \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconlist_content_wrap\"><header class=\"entry-content-header\" aria-label=\"Icon: \"><\/header><div class='iconlist_content av_inherit_color'  itemprop=\"text\" ><p>The ANC processor chip<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<\/ul><\/div><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ldu7yu78-23-377a2c9e7a300b4b2a54be6a65a3d215\">\n#top .hr.av-ldu7yu78-23-377a2c9e7a300b4b2a54be6a65a3d215{\nmargin-top:10px;\nmargin-bottom:10px;\n}\n.hr.av-ldu7yu78-23-377a2c9e7a300b4b2a54be6a65a3d215 .hr-inner{\nwidth:500;\nborder-color:#702423;\n}\n<\/style>\n<div  class='hr av-ldu7yu78-23-377a2c9e7a300b4b2a54be6a65a3d215 hr-custom  avia-builder-el-81  el_after_av_one_half  el_before_av_textblock  hr-center hr-icon-no'><span class='hr-inner inner-border-av-border-thin'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833e7ea-16-78a757c391bde97b6e933ef64643da68\">\n#top .av_textblock_section.av-l833e7ea-16-78a757c391bde97b6e933ef64643da68 .avia_textblock{\ncolor:#101010;\n}\n<\/style>\n<section  class='av_textblock_section av-l833e7ea-16-78a757c391bde97b6e933ef64643da68 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><p>In the ideal world these elements would be total linear within a large dynamic range, have flat frequency and phase response and no internal noise. If this was the case, designing the ANC application would be a piece of cake. Unfortunately we have to face reality: A modern electret or MEMS microphone has quite a high dynamic range, a modest noise figure and a fairly flat frequency and phase response. The same goes for the ANC processor, which \u201conly\u201d adds some time delay as mentioned earlier. But when it comes to the receiver, the picture is a totally different one. Due to size constraints (especially in the in-ear earphones) a quite small receiver has to be chosen (\u00d88mm \u2013 \u00d815mm) and then some performance parameters become quite challenging.<\/p>\n<\/div><\/section>\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-akx4r-30-866388614b2df1653bca038b97b7e6d3\">\n.avia-section.av-akx4r-30-866388614b2df1653bca038b97b7e6d3 .av-parallax .av-parallax-inner{\nbackground-color:#702423;\nbackground-image:url(https:\/\/owolff.com\/wp-content\/uploads\/2023\/01\/background_graphic2-1-909x1030.png);\nbackground-repeat:no-repeat;\nbackground-position:50% 50%;\nbackground-attachment:scroll;\n}\n<\/style>\n<div id='av_section_8'  class='avia-section av-akx4r-30-866388614b2df1653bca038b97b7e6d3 main_color avia-section-large avia-no-border-styling  avia-builder-el-83  el_after_av_section  el_before_av_section  av-parallax-section avia-bg-style-parallax av-minimum-height av-minimum-height-custom av-height-custom  container_wrap sidebar_right'  data-section-bg-repeat='no-repeat' data-av_minimum_height_px='500'><div class='av-parallax' data-avia-parallax-ratio='0.3' ><div class='av-parallax-inner main_color avia-full-stretch'><\/div><\/div><div class='container av-section-cont-open' style='height:500px'><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-557'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ldydmd2k-6f86833543404c3c92b3c36d9175fcb9\">\n#top .av-special-heading.av-ldydmd2k-6f86833543404c3c92b3c36d9175fcb9{\nmargin:30px 0 0 0;\npadding-bottom:20px;\nfont-size:30px;\n}\nbody .av-special-heading.av-ldydmd2k-6f86833543404c3c92b3c36d9175fcb9 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-ldydmd2k-6f86833543404c3c92b3c36d9175fcb9 .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-ldydmd2k-6f86833543404c3c92b3c36d9175fcb9 .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-ldydmd2k-6f86833543404c3c92b3c36d9175fcb9 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-ldydmd2k-6f86833543404c3c92b3c36d9175fcb9 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-ldydmd2k-6f86833543404c3c92b3c36d9175fcb9 av-special-heading-h2 meta-heading blockquote modern-quote modern-centered  avia-builder-el-84  el_before_av_one_half  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Design parameters<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n<div class='flex_column_table av-fszce-18-57a2cc0513a31dd6a1482869fe24c373 sc-av_one_half av-equal-height-column-flextable'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-18-57a2cc0513a31dd6a1482869fe24c373\">\n#top .flex_column_table.av-equal-height-column-flextable.av-fszce-18-57a2cc0513a31dd6a1482869fe24c373{\nmargin-top:30px;\nmargin-bottom:0px;\n}\n.flex_column.av-fszce-18-57a2cc0513a31dd6a1482869fe24c373{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-18-57a2cc0513a31dd6a1482869fe24c373 av_one_half  avia-builder-el-85  el_after_av_heading  el_before_av_one_half  first flex_column_table_cell av-equal-height-column av-align-top av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833e7ea-15-bdcee24a9721cd34d3a8cfa4b2602403\">\n#top .av_textblock_section.av-l833e7ea-15-bdcee24a9721cd34d3a8cfa4b2602403 .avia_textblock{\ncolor:#ffffff;\n}\n<\/style>\n<section  class='av_textblock_section av-l833e7ea-15-bdcee24a9721cd34d3a8cfa4b2602403 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><h3>Primary parameter: Maximum Sound Pressure Level<\/h3>\n<div class=\"BrdtekstFutura\">If the ANC performance should be able to handle really high noise sound pressure levels up to ex. 140dB SPL (traffic noise, flight take offs, shouts, building construction machine activities etc.), the receiver should be able to handle these SPLs as well without significant distortion and knowing that the noise signal must be reproduced in counter phase according to ANC loop. This is only possible with a receiver allowing a very high stroke of the membrane without entering a compression mode. The smaller the receiver is in diameter, the harder the need will be for a high membrane stroke.<\/div>\n<\/div><\/section><\/div><div class='av-flex-placeholder'><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-biw9y-25-2cbe12544cb917b370286c497fe81c16\">\n#top .flex_column_table.av-equal-height-column-flextable.av-biw9y-25-2cbe12544cb917b370286c497fe81c16{\nmargin-top:30px;\nmargin-bottom:0px;\n}\n.flex_column.av-biw9y-25-2cbe12544cb917b370286c497fe81c16{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-biw9y-25-2cbe12544cb917b370286c497fe81c16 av_one_half  avia-builder-el-87  el_after_av_one_half  avia-builder-el-last  flex_column_table_cell av-equal-height-column av-align-top av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833e7ea-12-71c332710d32a3cc6105cf2b11608095\">\n#top .av_textblock_section.av-l833e7ea-12-71c332710d32a3cc6105cf2b11608095 .avia_textblock{\ncolor:#ffffff;\n}\n<\/style>\n<section  class='av_textblock_section av-l833e7ea-12-71c332710d32a3cc6105cf2b11608095 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><h3 class=\"BrdtekstFutura\">Secondary parameters<\/h3>\n<div class=\"BrdtekstFutura\">The following parameters for the receiver application are of secondary importance, because they are strongly related to the amount of filter orders available in the chosen ANC digital system. Almost all of the following parameters can be compensated for, by having unlimited access to the number of filters, but the tradeoff is the cost for the ANC circuit as well as an increased power consumption. Therefore a good engineering practice is to optimize the following parameters before relying on a higher number of ANC filter orders.<\/div>\n<\/div><\/section><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<\/p>\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='av_section_9'  class='avia-section av-akx4r-14-d71ddf64b48799f2989b5dbc4f92b0e5 main_color avia-section-large avia-no-border-styling  avia-builder-el-89  el_after_av_section  el_before_av_section  avia-bg-style-scroll av-minimum-height av-minimum-height-custom av-height-custom  container_wrap sidebar_right'   data-av_minimum_height_px='500'><div class='container av-section-cont-open' style='height:500px'><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-557'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-13-1b2c988a5d0f8f0b745a26127d756967\">\n#top .flex_column.av-fszce-13-1b2c988a5d0f8f0b745a26127d756967{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-fszce-13-1b2c988a5d0f8f0b745a26127d756967{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-fszce-13-1b2c988a5d0f8f0b745a26127d756967{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-13-1b2c988a5d0f8f0b745a26127d756967 av_one_half  avia-builder-el-90  el_before_av_one_half  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ldydmglg-492f3630a437952cadf1000e52ef5571\">\n#top .av-special-heading.av-ldydmglg-492f3630a437952cadf1000e52ef5571{\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-ldydmglg-492f3630a437952cadf1000e52ef5571 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-ldydmglg-492f3630a437952cadf1000e52ef5571 .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-ldydmglg-492f3630a437952cadf1000e52ef5571 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-ldydmglg-492f3630a437952cadf1000e52ef5571 .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-ldydmglg-492f3630a437952cadf1000e52ef5571 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-ldydmglg-492f3630a437952cadf1000e52ef5571 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-ldydmglg-492f3630a437952cadf1000e52ef5571 av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-91  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Damping Ratio<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-l833e7ea-10-58d69e136518e79f7ab36656d389627e '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><div class=\"BrdtekstFutura\">The Damping Ratio, \u03b6 (zeta), for the whole receiver application should be tuned to around 0.7 for achieving best reproduction of the electrical signal into acoustic signal (best mirroring of electrical signal). The best mirroring of the electrical signal into an acoustic signal (reproduced by the receiver) is very important for assuring the highest linearity of the ANC loop and thereby best ANC performance. A Damping Ratio of around 0.7 is the best compromise between fast enough rise time and minimized post ringing at the system`s resonance frequency.<\/div>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-biw9y-11-491a988ac28b43143da6ad14ba27ebf1\">\n#top .flex_column.av-biw9y-11-491a988ac28b43143da6ad14ba27ebf1{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-biw9y-11-491a988ac28b43143da6ad14ba27ebf1{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-biw9y-11-491a988ac28b43143da6ad14ba27ebf1{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-biw9y-11-491a988ac28b43143da6ad14ba27ebf1 av_one_half  avia-builder-el-93  el_after_av_one_half  el_before_av_one_half  flex_column_div av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8ljaggb-009dbad7018969ac892e11347a43dbbb\">\n.avia-image-container.av-l8ljaggb-009dbad7018969ac892e11347a43dbbb img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l8ljaggb-009dbad7018969ac892e11347a43dbbb .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l8ljaggb-009dbad7018969ac892e11347a43dbbb av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-94  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-545 avia-img-lazy-loading-not-545 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Active_Noise_cancellation__design_parameters@2x-1030x658.png\" alt='' title='Active_Noise_cancellation__design_parameters@2x'  height=\"658\" width=\"1030\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Active_Noise_cancellation__design_parameters@2x-1030x658.png 1030w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Active_Noise_cancellation__design_parameters@2x-300x192.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Active_Noise_cancellation__design_parameters@2x-768x491.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Active_Noise_cancellation__design_parameters@2x-1536x982.png 1536w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Active_Noise_cancellation__design_parameters@2x-1500x959.png 1500w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Active_Noise_cancellation__design_parameters@2x-705x451.png 705w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/Active_Noise_cancellation__design_parameters@2x.png 1920w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/div><\/div><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-biw9y-8-6f7078dedcd72a4515a91c091e1f1d7a\">\n.flex_column.av-biw9y-8-6f7078dedcd72a4515a91c091e1f1d7a{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-biw9y-8-6f7078dedcd72a4515a91c091e1f1d7a av_one_half  avia-builder-el-95  el_after_av_one_half  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8ljaggb-7-650c1872707f937777944508d1298c1c\">\n.avia-image-container.av-l8ljaggb-7-650c1872707f937777944508d1298c1c img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l8ljaggb-7-650c1872707f937777944508d1298c1c .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l8ljaggb-7-650c1872707f937777944508d1298c1c av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-96  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-551 avia-img-lazy-loading-not-551 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/phase_response_1.jpg\" alt='' title='phase_response_1'  height=\"277\" width=\"718\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/phase_response_1.jpg 718w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/phase_response_1-300x116.jpg 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/phase_response_1-705x272.jpg 705w\" sizes=\"(max-width: 718px) 100vw, 718px\" \/><\/div><\/div><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-biw9y-6-0af3aec77dfebfa3cb703f7650a77560\">\n.flex_column.av-biw9y-6-0af3aec77dfebfa3cb703f7650a77560{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-biw9y-6-0af3aec77dfebfa3cb703f7650a77560 av_one_half  avia-builder-el-97  el_after_av_one_half  avia-builder-el-last  flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-l833e7ea-9-d82d4124456ebe9eb271e6ea85a507d9 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><div class=\"BrdtekstFutura\">When looking at the Frequency domain, we normally express a Quality Factor (Q factor) for the resonance system. The relation between the damping ratio and quality factor is given by the equation (1)<\/div>\n<div><\/div>\n<h3><\/h3>\n<h3 class=\"overskiftH3\">\u03b6=1\/(2*Q)<\/h3>\n<div><\/div>\n<div class=\"BrdtekstFutura\">It can be calculated using equation 1, that a damping ratio around 0.7 will result in a Q factor of 0.7 (called critical damping). This means that in the frequency domain you would need a critical damped system for achieving best ANC conditions.<\/div>\n<\/div><\/section><br \/>\n<section  class='av_textblock_section av-l833e7ea-3-a7c617b65a5f74e3655a8719d7d39e2f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>The total Q factor for the system is not the same as the total Q factor for the receiver involved. The receivers total Q factor must primarily be controlled by a very strong magnet system which will lower the Q factor down towards the desired value of 0.7, but normally this is not enough for reaching the critical damped factor of 0.7. The remaining lowering of the system Q factor will be done by mesh tuning on rear side of the receiver and\/or mesh covering a rear vent in the earphone\/headphone.<br \/>\nSo when a Q factor of approx. 0.7 is tuned in, the Damping ratio will also be approx. 0.7 according to equation 1.<\/p>\n<\/div><\/section><\/p><\/div>\n\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ldu9w2sp-a486ac4f76574ede2b92a5bcc297ca4b\">\n.avia-section.av-ldu9w2sp-a486ac4f76574ede2b92a5bcc297ca4b{\nbackground-color:#f9f9f9;\nbackground-image:unset;\n}\n<\/style>\n<div id='av_section_10'  class='avia-section av-ldu9w2sp-a486ac4f76574ede2b92a5bcc297ca4b main_color avia-section-default avia-no-border-styling  avia-builder-el-100  el_after_av_section  el_before_av_section  avia-bg-style-scroll container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-557'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-biw9y-4-2f30a4e8bd9b97d187fd4931f065f259\">\n#top .flex_column.av-biw9y-4-2f30a4e8bd9b97d187fd4931f065f259{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-biw9y-4-2f30a4e8bd9b97d187fd4931f065f259{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-biw9y-4-2f30a4e8bd9b97d187fd4931f065f259{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-biw9y-4-2f30a4e8bd9b97d187fd4931f065f259 av_one_half  avia-builder-el-101  el_before_av_one_half  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-6l70d-b3d8b9f8f4f02945d1bec3e36877e2a0\">\n#top .av-special-heading.av-6l70d-b3d8b9f8f4f02945d1bec3e36877e2a0{\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-6l70d-b3d8b9f8f4f02945d1bec3e36877e2a0 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-6l70d-b3d8b9f8f4f02945d1bec3e36877e2a0 .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-6l70d-b3d8b9f8f4f02945d1bec3e36877e2a0 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-6l70d-b3d8b9f8f4f02945d1bec3e36877e2a0 .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-6l70d-b3d8b9f8f4f02945d1bec3e36877e2a0 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-6l70d-b3d8b9f8f4f02945d1bec3e36877e2a0 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-6l70d-b3d8b9f8f4f02945d1bec3e36877e2a0 av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-102  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Phase response<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-l833e7ea-2-67de9f782e9d3622217b470045761153 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><div class=\"BrdtekstFutura\">The receivers phase response up to around 1.2 kHz must have minimum phase shifts with a smooth response for the ANC processor to be able to handle the signal. Therefore resonances in this frequency range must be kept at a minimum. Preferably only the mechanical resonance determined by the moving mass (coil &amp; membrane) and the compliance of the membrane. This resonance is unavoidable in a moving coil receiver but must have as low a resonance frequency as possible for being positioned outside of the pass band.<\/div>\n<div class=\"BrdtekstFutura\">It can be seen that a damping ratio of 0.7 (equation 1) will result in the most smooth phase response and thereby best ANC counter phase correction conditions.<\/div>\n<div class=\"BrdtekstFutura\"><\/div>\n<div class=\"BrdtekstFutura\">The conclusion is that a system quality factor of 0.7 ensures the best conversion of the electrical signal to the acoustic signal out of the receiver, which is needed for best linearity of the system and the flattest phase response ensuring best counter phase conditions for the ANC loop.<\/div>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-biw9y-1-262866e86c1759b71f2949d386340c79\">\n#top 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