{"id":957,"date":"2022-10-26T13:58:52","date_gmt":"2022-10-26T13:58:52","guid":{"rendered":"https:\/\/owolff.com.linux20.curanetserver.dk\/?page_id=957"},"modified":"2024-10-07T14:22:15","modified_gmt":"2024-10-07T12:22:15","slug":"telecom-handsets","status":"publish","type":"page","link":"https:\/\/owolff.com\/en\/application-support\/telecom-handsets\/","title":{"rendered":"Telecom handsets"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lcg9ppdn-caa2988c959a95bab387a53369cea3c3\">\n.avia-section.av-lcg9ppdn-caa2988c959a95bab387a53369cea3c3{\nmargin-bottom:0px;\n}\n.avia-section.av-lcg9ppdn-caa2988c959a95bab387a53369cea3c3 .av-parallax .av-parallax-inner{\nbackground-color:#702423;\nbackground-image:url(https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/telecom-handset.jpg);\nbackground-repeat:no-repeat;\nbackground-position:50% 50%;\nbackground-attachment:scroll;\n}\n.avia-section.av-lcg9ppdn-caa2988c959a95bab387a53369cea3c3 .av-section-color-overlay{\nopacity:0.7;\nbackground-color:#702423;\n}\n<\/style>\n<div id='av_section_1'  class='avia-section av-lcg9ppdn-caa2988c959a95bab387a53369cea3c3 main_color avia-section-default avia-no-border-styling  avia-builder-el-0  el_before_av_submenu  avia-builder-el-first  avia-full-stretch av-parallax-section avia-bg-style-parallax av-section-color-overlay-active av-minimum-height av-minimum-height-custom av-height-custom  container_wrap sidebar_right'  data-section-bg-repeat='stretch' data-av_minimum_height_px='320'><div class='av-parallax' data-avia-parallax-ratio='0.3' ><div class='av-parallax-inner main_color avia-full-stretch'><\/div><\/div><div class=\"av-section-color-overlay-wrap\"><div class=\"av-section-color-overlay\"><\/div><div class='container av-section-cont-open' style='height:320px'><main  role=\"main\" itemprop=\"mainContentOfPage\"  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class='av-special-heading-tag '  itemprop=\"headline\"  >Telecom handsets<\/h1><div class='av_custom_color av-subheading av-subheading_below'><p>Standards, compatibility and design<\/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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first flex_column_table_cell av-equal-height-column av-align-top av-animated-generic left-to-right av-zero-column-padding  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-9o559-1772e619f826cd9733c9ac7e85cfb153\">\n#top .av-special-heading.av-9o559-1772e619f826cd9733c9ac7e85cfb153{\nmargin:0 0 0 0;\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-9o559-1772e619f826cd9733c9ac7e85cfb153 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-9o559-1772e619f826cd9733c9ac7e85cfb153 .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-9o559-1772e619f826cd9733c9ac7e85cfb153 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-9o559-1772e619f826cd9733c9ac7e85cfb153 .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-9o559-1772e619f826cd9733c9ac7e85cfb153 .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-9o559-1772e619f826cd9733c9ac7e85cfb153 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-9o559-1772e619f826cd9733c9ac7e85cfb153 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\"  >Telecom handsets<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-le72pzsg-1224e51c6370d1084102cb4daa9223a4 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Several design challenges exist when designing audio for a telecom handsets. These include:<\/p>\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-15vtvr-f8c4a4d6d9f2e3f597d4c4294861cc9b\">\n#top .flex_column_table.av-equal-height-column-flextable.av-15vtvr-f8c4a4d6d9f2e3f597d4c4294861cc9b{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-15vtvr-f8c4a4d6d9f2e3f597d4c4294861cc9b{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-15vtvr-f8c4a4d6d9f2e3f597d4c4294861cc9b av_one_half  avia-builder-el-8  el_after_av_one_half  avia-builder-el-last  flex_column_table_cell av-equal-height-column av-align-top av-animated-generic left-to-right av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l9pnlzyy-8ec4f39cf7e44b49d33eae401a914280\">\n#top .avia-icon-list-container.av-l9pnlzyy-8ec4f39cf7e44b49d33eae401a914280 .iconlist_icon{\ncolor:#ffffff;\nbackground-color:#702423;\nborder:1px solid #ffffff;\n}\n#top .avia-icon-list-container.av-l9pnlzyy-8ec4f39cf7e44b49d33eae401a914280 .iconlist_icon svg:first-child{\nstroke:#ffffff;\nfill:#ffffff;\n}\n.avia-icon-list-container.av-l9pnlzyy-8ec4f39cf7e44b49d33eae401a914280 .iconlist_content{\ncolor:#101010;\n}\n<\/style>\n<div  class='avia-icon-list-container av-l9pnlzyy-8ec4f39cf7e44b49d33eae401a914280  avia-builder-el-9  avia-builder-el-no-sibling '><ul class='avia-icon-list avia_animate_when_almost_visible avia-icon-list-left av-iconlist-small av-l9pnlzyy-8ec4f39cf7e44b49d33eae401a914280 avia-iconlist-animate'>\n<li><div class='iconlist_icon av-dyc2l-7a130dabd6960d14697fd3eef864afe5 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>Frequency response (receiving audio) must pass type approval<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-3oyxfx-ba1e6b1de133cb0a1527434fdfb339b9 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>Leak tolerance (consistent bass response)<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-3isj9p-e5322683e5c426d2e5cca0912770bd1a 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>Hearing Aid Compatibility (HAC)<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-3fneql-0d64e3285abb85482566f455838d4d6d 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>Microphone (transmitting audio) must pass type approval<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-3974ut-c7b5d5b89952a136d42ee49eb92ee877 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>Chosing loudspeaker for hands-free audio<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<\/ul><\/div><\/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-10  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-957'><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-11  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-altc5-1e147b3d364a5b08c23492dccb390891\">\n#top .av-special-heading.av-altc5-1e147b3d364a5b08c23492dccb390891{\nmargin:0 0 0 0;\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-altc5-1e147b3d364a5b08c23492dccb390891 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-altc5-1e147b3d364a5b08c23492dccb390891 .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-altc5-1e147b3d364a5b08c23492dccb390891 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-altc5-1e147b3d364a5b08c23492dccb390891 .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-altc5-1e147b3d364a5b08c23492dccb390891 .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-altc5-1e147b3d364a5b08c23492dccb390891 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-altc5-1e147b3d364a5b08c23492dccb390891 av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-12  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Target response and standards<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-le72pzsg-1224e51c6370d1084102cb4daa9223a4 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>For telecom handsets to be type approved, certain performance criteria must be met. The handset&#8217;s frequency response (receive) must be measured on a standardized artificial ear, which basically is an acoustical copy of the human ear designed with a controlled leakage. The frequency response must lie within a certain &#8220;window&#8221; defined in the standard. The same goes for the outgoing sound (send) which also has to meet certain frequency response criteria defined in the standards. Examples of such windows are shown below.<\/p>\n<div class=\"sectionintro\">\n<h3 class=\"OverskriftH4\">Super Wideband gaining pace<\/h3>\n<\/div>\n<div class=\"BrdtekstFutura\">The share of telecom handsets that comply with the Super Wideband standard is growing, which requires receivers with high technical performance as well as it increases the design complexity of the handsets.<\/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-14  el_after_av_one_half  el_before_av_one_half  flex_column_table_cell av-equal-height-column av-align-top av-zero-column-padding  '     ><p><div class='avia-data-table-wrap av-342rid-50a430dafc1ee975a390dd3522d9ead9 avia_responsive_table avia-table-1'><table  class='avia-table avia-data-table avia_pricing_default  avia-builder-el-15  el_before_av_textblock  avia-builder-el-first '  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/Table\" ><tbody><tr class=''><td class=''>Super Wideband<\/td><td class=''>ITU-T<\/td><td class=''>P1120<\/td><\/tr><tr class=''><td class=''>Wideband<\/td><td class=''>IEC<\/td><td class=''>TIA920A<\/td><\/tr><tr class=''><td class=''>Wideband<\/td><td class=''>ITU-T<\/td><td class=''>P.311<\/td><\/tr><tr class=''><td class=''>Narrowband<\/td><td class=''>IEC<\/td><td class=''>TIA810B<\/td><\/tr><\/tbody><\/table><\/div><br \/>\n<section  class='av_textblock_section av-le735tqb-3bdcf8c45897fdeca0275a37395566c2 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center;\"><em>Ole Wolff has the test eqiupment, tools and experience neccessary to design handset that comply with all of the telecom standards.<\/em><\/p>\n<\/div><\/section><\/p><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-8sncl-c7ebc303b29ab05b34c391a77f243ab7\">\n.flex_column.av-8sncl-c7ebc303b29ab05b34c391a77f243ab7{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-8sncl-c7ebc303b29ab05b34c391a77f243ab7 av_one_half  avia-builder-el-17  el_after_av_one_half  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-l8lg505w-0d66ead5dbfd0b8a6abafe0e8ba396b9\">\n.avia-image-container.av-l8lg505w-0d66ead5dbfd0b8a6abafe0e8ba396b9 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l8lg505w-0d66ead5dbfd0b8a6abafe0e8ba396b9 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l8lg505w-0d66ead5dbfd0b8a6abafe0e8ba396b9 av-styling- avia_animated_image av-animated-when-visible-95 left-to-right avia-align-center  avia-builder-el-18  el_before_av_textblock  avia-builder-el-first '   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-768 avia-img-lazy-loading-not-768 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_receive@2x.png\" alt='' title='Telecom_graphs_receive@2x'  height=\"643\" width=\"1000\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_receive@2x.png 1000w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_receive@2x-300x193.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_receive@2x-768x494.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_receive@2x-705x453.png 705w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/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\" ><p style=\"text-align: center;\"><em>Receive frequency response and limits.<\/em><\/p>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-8sncl-d2e0d17af8cf3a0230ade0f00356cc21\">\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-20  el_after_av_one_half  avia-builder-el-last  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-l8lg505w-91c7d3359c9da4075f84375806d29f5f\">\n.avia-image-container.av-l8lg505w-91c7d3359c9da4075f84375806d29f5f img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l8lg505w-91c7d3359c9da4075f84375806d29f5f .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l8lg505w-91c7d3359c9da4075f84375806d29f5f av-styling- avia_animated_image av-animated-when-visible-95 left-to-right avia-align-center  avia-builder-el-21  el_before_av_textblock  avia-builder-el-first '   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-767 avia-img-lazy-loading-not-767 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_send@2x.png\" alt='' title='Telecom_graphs_send@2x'  height=\"643\" width=\"1000\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_send@2x.png 1000w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_send@2x-300x193.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_send@2x-768x494.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_send@2x-705x453.png 705w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/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\" ><p style=\"text-align: center;\"><em>Send frequency response and limits.<\/em><\/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-jftj7-a35d8ceffabd77c8d4a9fb221a1f3983\">\n.avia-section.av-jftj7-a35d8ceffabd77c8d4a9fb221a1f3983{\nbackground-color:#ffffff;\nbackground-image:unset;\n}\n<\/style>\n<div id='av_section_4'  class='avia-section av-jftj7-a35d8ceffabd77c8d4a9fb221a1f3983 alternate_color avia-section-large avia-no-border-styling  avia-builder-el-23  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-957'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-43967-ae764e4a69514840a222d463b2c9102a\">\n#top .flex_column.av-43967-ae764e4a69514840a222d463b2c9102a{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-43967-ae764e4a69514840a222d463b2c9102a{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-43967-ae764e4a69514840a222d463b2c9102a{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-43967-ae764e4a69514840a222d463b2c9102a av_one_half  avia-builder-el-24  el_before_av_one_half  avia-builder-el-first  first flex_column_div 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-9vjcl-4e12fc7f227ee06392c0b751582a24b2\">\n#top .av-special-heading.av-9vjcl-4e12fc7f227ee06392c0b751582a24b2{\nmargin:0 0 0 0;\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-9vjcl-4e12fc7f227ee06392c0b751582a24b2 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-9vjcl-4e12fc7f227ee06392c0b751582a24b2 .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-9vjcl-4e12fc7f227ee06392c0b751582a24b2 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-9vjcl-4e12fc7f227ee06392c0b751582a24b2 .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-9vjcl-4e12fc7f227ee06392c0b751582a24b2 .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-9vjcl-4e12fc7f227ee06392c0b751582a24b2 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-9vjcl-4e12fc7f227ee06392c0b751582a24b2 av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-25  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Consistent bass response (leak tolerance)<\/h2><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-le72pzsg-61d2633b20e1cb5dc0fa499d3ad68f60\">\n#top .av_textblock_section.av-le72pzsg-61d2633b20e1cb5dc0fa499d3ad68f60 .avia_textblock{\ncolor:#101010;\n}\n<\/style>\n<section  class='av_textblock_section av-le72pzsg-61d2633b20e1cb5dc0fa499d3ad68f60 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><p>When holding a handset close to the ear there will always be an acoustic leakage formed between handset and the ear. If the receiver was ideal (large sized membrane &amp; motor), such leakage would not degrade the sound quality. In most modern handsets the performance of the incoming audio has shifted from being handled by the transducer alone to involve acoustical access to the internal part of the handset. This is due to the fact that handsets are getting smaller and smaller which calls for smaller components, including the receiver (driver) producing the sound. However, shrinking the receivers size will have a huge impact on the sound reproduction capability easpecially in the bass region if no modifications are done.<\/p>\n<p>The solution is to use a receiver designed to have a huge bass boost and introduce a controlled leakage between the front of the receiver to the outer free field or alternatively to the inside of the handset (rear side of the driver). The result will be that the huge initial bass boost will be loaded down to a flat response, which then can accept an additional leakage between handset and ear without any significant loss of bass content. This design however is not not straght forward and involves controlling acoustic resistances, masses and volumes using slits, tubes, cavities and fabric (damping).<\/p>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-43967-85bbfbb7ba50282f740f6f7bdabeff82\">\n#top .flex_column.av-43967-85bbfbb7ba50282f740f6f7bdabeff82{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-43967-85bbfbb7ba50282f740f6f7bdabeff82{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-43967-85bbfbb7ba50282f740f6f7bdabeff82{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-43967-85bbfbb7ba50282f740f6f7bdabeff82 av_one_half  avia-builder-el-27  el_after_av_one_half  el_before_av_hr  flex_column_div 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-l833dvw1-bcef3898e063b800d3bc34adf4e9e5fc\">\n.avia-image-container.av-l833dvw1-bcef3898e063b800d3bc34adf4e9e5fc img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-bcef3898e063b800d3bc34adf4e9e5fc .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-bcef3898e063b800d3bc34adf4e9e5fc av-styling- av-img-linked avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-28  el_before_av_textblock  avia-builder-el-first '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><a href=\"https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/sound-pressure-level-curve.png\" data-srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/sound-pressure-level-curve.png 1030w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/sound-pressure-level-curve-300x166.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/sound-pressure-level-curve-768x425.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/sound-pressure-level-curve-705x390.png 705w\" data-sizes=\"(max-width: 1030px) 100vw, 1030px\" class='avia_image '  aria-label='sound pressure level curve'><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-3929 avia-img-lazy-loading-not-3929 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/sound-pressure-level-curve.png\" alt='' title='sound pressure level curve'  height=\"570\" width=\"1030\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/sound-pressure-level-curve.png 1030w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/sound-pressure-level-curve-300x166.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/sound-pressure-level-curve-768x425.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/sound-pressure-level-curve-705x390.png 705w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/a><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lg3s76-ddadb2b7510e570d19c8bcb4250d2685\">\n#top .av_textblock_section.av-l8lg3s76-ddadb2b7510e570d19c8bcb4250d2685 .avia_textblock{\ncolor:#101010;\n}\n<\/style>\n<section  class='av_textblock_section av-l8lg3s76-ddadb2b7510e570d19c8bcb4250d2685 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><p style=\"text-align: center;\"><em>Example of frequency response of handset without leak tolerance when held firmly to the ear (solid) and when moved just a few milimeters away from the ear (dashed). A leak tolerant design would only loose a few dB&#8217;s and thus be similar to the solid curve in both situations resulting in a much more consistent (pleasant) LF reproduction.<\/em><\/p>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-le7482et-fa145572f93e776d7755866f5a093248\">\n#top .hr.hr-invisible.av-le7482et-fa145572f93e776d7755866f5a093248{\nheight:30px;\n}\n<\/style>\n<div  class='hr av-le7482et-fa145572f93e776d7755866f5a093248 hr-invisible  avia-builder-el-30  el_after_av_one_half  el_before_av_textblock '><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-l8lg3s76-ddadb2b7510e570d19c8bcb4250d2685\">\n#top .av_textblock_section.av-l8lg3s76-ddadb2b7510e570d19c8bcb4250d2685 .avia_textblock{\ncolor:#101010;\n}\n<\/style>\n<section  class='av_textblock_section av-l8lg3s76-ddadb2b7510e570d19c8bcb4250d2685 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><p style=\"text-align: left;\">The solution is to use a receiver designed to have a huge bass boost and introduce a controlled leakage between the front of the receiver to the outer free field or alternatively to the inside of the handset (rear side of the driver). The result will be that the huge initial bass boost will be loaded down to a flat response, which then can accept an additional leakage between handset and ear without any significant loss of bass content. This design however is not not straght forward and involves controlling acoustic resistances, masses and volumes using slits, tubes, cavities and fabric (damping).<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-43967-43595628779d869ab20a867f465d7419\">\n.flex_column.av-43967-43595628779d869ab20a867f465d7419{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-43967-43595628779d869ab20a867f465d7419 av_one_half  avia-builder-el-32  el_after_av_textblock  el_before_av_one_half  first flex_column_div av-animated-generic right-to-left av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833dvw1-708990f18d0998149c89f8f640b2de4d\">\n.avia-image-container.av-l833dvw1-708990f18d0998149c89f8f640b2de4d img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-708990f18d0998149c89f8f640b2de4d .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-708990f18d0998149c89f8f640b2de4d av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-33  el_before_av_textblock  avia-builder-el-first '   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-765 avia-img-lazy-loading-not-765 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage1@2x.jpeg\" alt='' title='Telecom_leakage1@2x'  height=\"800\" width=\"800\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage1@2x.jpeg 800w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage1@2x-300x300.jpeg 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage1@2x-80x80.jpeg 80w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage1@2x-768x768.jpeg 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage1@2x-36x36.jpeg 36w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage1@2x-180x180.jpeg 180w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage1@2x-705x705.jpeg 705w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/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\" ><p style=\"text-align: center;\"><em>The leakage path can be built into the handset using carefully dimensioned tubes and acoustic fabric.<\/em><\/p>\n<\/div><\/section><\/p><\/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_half  avia-builder-el-35  el_after_av_one_half  avia-builder-el-last  flex_column_div av-animated-generic right-to-left av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833dvw1-c71a5ec74de4549e4b0f9be5b770bc9a\">\n.avia-image-container.av-l833dvw1-c71a5ec74de4549e4b0f9be5b770bc9a img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-c71a5ec74de4549e4b0f9be5b770bc9a .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-c71a5ec74de4549e4b0f9be5b770bc9a av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-36  el_before_av_textblock  avia-builder-el-first '   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-764 avia-img-lazy-loading-not-764 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage2@2x.jpeg\" alt='' title='Telecom_leakage2@2x'  height=\"800\" width=\"800\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage2@2x.jpeg 800w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage2@2x-300x300.jpeg 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage2@2x-80x80.jpeg 80w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage2@2x-768x768.jpeg 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage2@2x-36x36.jpeg 36w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage2@2x-180x180.jpeg 180w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_leakage2@2x-705x705.jpeg 705w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/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\" ><p style=\"text-align: center;\"><em>The OWR-3083 receiver has built-in leakage which can simplify the acoustic design of the handset.<\/em><\/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-akx4r-b7008b386b0a398e3a7400d7bccd9482\">\n.avia-section.av-akx4r-b7008b386b0a398e3a7400d7bccd9482{\nbackground-color:#f9f9f9;\nbackground-image:unset;\n}\n<\/style>\n<div id='1'  class='avia-section av-akx4r-b7008b386b0a398e3a7400d7bccd9482 main_color avia-section-large avia-no-border-styling  avia-builder-el-38  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-957'><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-39  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-8qen1-c003be872fced71113493219fe78497b\">\n#top .av-special-heading.av-8qen1-c003be872fced71113493219fe78497b{\nmargin:0 0 0 0;\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-8qen1-c003be872fced71113493219fe78497b .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-8qen1-c003be872fced71113493219fe78497b .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-8qen1-c003be872fced71113493219fe78497b .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-8qen1-c003be872fced71113493219fe78497b .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-8qen1-c003be872fced71113493219fe78497b .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-8qen1-c003be872fced71113493219fe78497b .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-8qen1-c003be872fced71113493219fe78497b av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-40  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Hearing aid compatability (HAC)<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-le72pzsg-1224e51c6370d1084102cb4daa9223a4 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Hearing Aid Compatibility (HAC) is a property of the handset where a magnetic field mirroring the audio signal is distributed from the ear cap plane of the handset and picked up by a coil positioned in a hearing aid worn by the phone user. The hearing aid will then transform the magnetic signal into an acoustic signal with the applied corrections needed for the user. Typically the hearing aid will turn off its microphone when a HAC signal is detected and thus there will be no &#8220;acoustics&#8221; between the senders outgoing signal and the signal reaching the hearing aid. For the hearing impaired this technique can increase the percieved sound quality considerably.<\/p>\n<p>In most cases the receiver unit will produce this magnetic signal using its built-in voice coil. Alternatively an external tele coil can be built into the handset if the receiver cannot generate the required magnetic signal strength on its own. Receivers having HAC compatibility are typically designed to have a \u201chigh&#8221; current coil for keeping up a high magnetic signal as well as a high acoustic signal.<\/p>\n<h3 class=\"OverskriftH4\">DSP is not the answer<\/h3>\n<p>It is important that the receiver&#8217;s frequency response (in the HAC window) is acoustically well balanced since drastic DSP corrections would also affect the HAC signal.<\/p>\n<p>Often the handset is placed on top of the hearing aid to ensure the best pickup of the magnetic signal.<\/p>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-biw9y-e71f947c0c23c0a8863bf5f75e77065f\">\n#top .flex_column.av-biw9y-e71f947c0c23c0a8863bf5f75e77065f{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-biw9y-e71f947c0c23c0a8863bf5f75e77065f{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-biw9y-e71f947c0c23c0a8863bf5f75e77065f{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-biw9y-e71f947c0c23c0a8863bf5f75e77065f av_one_half  avia-builder-el-42  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-l833dvw1-042cd553f03ae659491dbce952cc5dac\">\n.avia-image-container.av-l833dvw1-042cd553f03ae659491dbce952cc5dac img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-042cd553f03ae659491dbce952cc5dac .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-042cd553f03ae659491dbce952cc5dac av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-43  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-763 avia-img-lazy-loading-not-763 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/HAC1@2x.jpeg\" alt='' title='HAC1@2x'  height=\"1100\" width=\"1000\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/HAC1@2x.jpeg 1000w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/HAC1@2x-273x300.jpeg 273w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/HAC1@2x-936x1030.jpeg 936w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/HAC1@2x-768x845.jpeg 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/HAC1@2x-641x705.jpeg 641w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/div><\/div><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-biw9y-2687f233360ecbbeb467f2ce84db4c3b\">\n.flex_column.av-biw9y-2687f233360ecbbeb467f2ce84db4c3b{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-biw9y-2687f233360ecbbeb467f2ce84db4c3b av_one_half  avia-builder-el-44  el_after_av_one_half  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-l833e7ea-dc859c8958fca18fc161bfe8a37a3212 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><div class=\"BrdtekstFutura\">\n<h3 class=\"OverskriftH4\">HAC limits and standards<\/h3>\n<div class=\"BrdtekstFutura\">\n<div class=\"BrdtekstFutura\">To make a handset HAC compatible, it must comply with telecom standards. An example of a narrow band HAC frequency window is shown to the right.<\/div>\n<\/div>\n<\/div>\n<div class=\"BrdtekstFutura\"><\/div>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-biw9y-e71f947c0c23c0a8863bf5f75e77065f\">\n.flex_column.av-biw9y-e71f947c0c23c0a8863bf5f75e77065f{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-biw9y-e71f947c0c23c0a8863bf5f75e77065f av_one_half  avia-builder-el-46  el_after_av_one_half  avia-builder-el-last  flex_column_div av-zero-column-padding  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833dvw1-c1816e3dff98b275bdce2d8acbc58fad\">\n.avia-image-container.av-l833dvw1-c1816e3dff98b275bdce2d8acbc58fad img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-c1816e3dff98b275bdce2d8acbc58fad .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-c1816e3dff98b275bdce2d8acbc58fad av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-47  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-762 avia-img-lazy-loading-not-762 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_HAC@2x-1030x662.png\" alt='' title='Telecom_graphs_HAC@2x'  height=\"662\" width=\"1030\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_HAC@2x-1030x662.png 1030w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_HAC@2x-300x193.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_HAC@2x-768x494.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_HAC@2x-705x453.png 705w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_HAC@2x.png 1400w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/div><\/div><\/div><\/div>\n\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='2'  class='avia-section av-akx4r-3d69bf253a9edb14d28f72124dff5954 main_color avia-section-large avia-no-border-styling  avia-builder-el-48  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-957'><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-49  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-a6fec843be8f1ba46a57541830a8b618\">\n.avia-image-container.av-l833dvw1-a6fec843be8f1ba46a57541830a8b618 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-a6fec843be8f1ba46a57541830a8b618 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-a6fec843be8f1ba46a57541830a8b618 av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-50  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-761 avia-img-lazy-loading-not-761 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_microphone@2x.jpeg\" alt='' title='Telecom_microphone@2x'  height=\"800\" width=\"800\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_microphone@2x.jpeg 800w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_microphone@2x-300x300.jpeg 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_microphone@2x-80x80.jpeg 80w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_microphone@2x-768x768.jpeg 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_microphone@2x-36x36.jpeg 36w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_microphone@2x-180x180.jpeg 180w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_microphone@2x-705x705.jpeg 705w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/div><\/div><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-7f10c8f1519a3bc62f84680724142994\">\n#top .flex_column.av-fszce-7f10c8f1519a3bc62f84680724142994{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-fszce-7f10c8f1519a3bc62f84680724142994{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-fszce-7f10c8f1519a3bc62f84680724142994{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-7f10c8f1519a3bc62f84680724142994 av_one_half  avia-builder-el-51  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-fkct1-7a3475bfb3c85694ed93974b2f2909ab\">\n#top .av-special-heading.av-fkct1-7a3475bfb3c85694ed93974b2f2909ab{\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-fkct1-7a3475bfb3c85694ed93974b2f2909ab .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-fkct1-7a3475bfb3c85694ed93974b2f2909ab .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-fkct1-7a3475bfb3c85694ed93974b2f2909ab .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-fkct1-7a3475bfb3c85694ed93974b2f2909ab .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-fkct1-7a3475bfb3c85694ed93974b2f2909ab .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-fkct1-7a3475bfb3c85694ed93974b2f2909ab .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-fkct1-7a3475bfb3c85694ed93974b2f2909ab av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-52  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Microphones<\/h2><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\" ><p>Typically space is not limited in the bottom area of the handset where the microphone is positioned. The microphones are typically electrete microphones in the size range of \u00d86mm to \u00d810mm which are low cost &#8220;work horses&#8221; with great performance. If space is limited, a much smaller MEMS microphone is the ideal choice.<\/p>\n<p>For both microphone types the HF response can be tuned by the front cavity and sound inlet in the handset, forming an acoustic low pass filter. Sometimes a front resonance at, say, 10 kHz can be designed into the handset to boost the response in that frequency range. The microphone response (send) must also comply with standards as described in the section &#8220;Target response and standards&#8221; above.<\/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-akx4r-9263e1c76fc4f198dc5d643a026b344f\">\n.avia-section.av-akx4r-9263e1c76fc4f198dc5d643a026b344f{\nbackground-color:#f9f9f9;\nbackground-image:unset;\n}\n<\/style>\n<div id='2'  class='avia-section av-akx4r-9263e1c76fc4f198dc5d643a026b344f main_color avia-section-large avia-no-border-styling  avia-builder-el-54  el_after_av_section  el_before_av_one_full  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-957'><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-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-k433h-c28330df6d59eb803dd50e5d79b3bc6a\">\n#top .av-special-heading.av-k433h-c28330df6d59eb803dd50e5d79b3bc6a{\npadding-bottom:0;\nfont-size:30px;\n}\nbody .av-special-heading.av-k433h-c28330df6d59eb803dd50e5d79b3bc6a .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-k433h-c28330df6d59eb803dd50e5d79b3bc6a .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-k433h-c28330df6d59eb803dd50e5d79b3bc6a .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-k433h-c28330df6d59eb803dd50e5d79b3bc6a .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-k433h-c28330df6d59eb803dd50e5d79b3bc6a .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-k433h-c28330df6d59eb803dd50e5d79b3bc6a av-special-heading-h3 custom-color-heading blockquote modern-quote  avia-builder-el-56  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h3 class='av-special-heading-tag '  itemprop=\"headline\"  >Simulations of handsets<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-l833e7ea-c473354428a66847f2cb6af26623bb2a '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><p>Using Comsol Multiphysics\u2122 Ole Wolff can simulate all of the acoustics involved when designing a telecom handset. We use accurate models of artificial ears for comparing simulation results with experimental data. Typically we do &#8220;virtual prototypes&#8221; in close cooperation with the customer&#8217;s design team. In this way the tranducers, acoustic chambers etc. can be modified and changed without ever having to build physical prototypes. Once the simulation results show that performance targets are met, samples are built and tested in the lab.<\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-le767f9k-6a0a76c60d5535d8d80685a3873dbd30\">\n#top .hr.hr-invisible.av-le767f9k-6a0a76c60d5535d8d80685a3873dbd30{\nheight:30px;\n}\n<\/style>\n<div  class='hr av-le767f9k-6a0a76c60d5535d8d80685a3873dbd30 hr-invisible  avia-builder-el-58  el_after_av_textblock  el_before_av_image '><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-l833dvw1-8a547b7177c7023e671cb391cf7baddd\">\n.avia-image-container.av-l833dvw1-8a547b7177c7023e671cb391cf7baddd img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-8a547b7177c7023e671cb391cf7baddd .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-8a547b7177c7023e671cb391cf7baddd av-styling- av-img-linked avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-59  el_after_av_hr  el_before_av_textblock '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><a href=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol1@2x.png\" data-srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol1@2x.png 1000w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol1@2x-300x150.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol1@2x-768x384.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol1@2x-705x353.png 705w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" class='avia_image '  aria-label='Telecom_graphs_Comsol1@2x'><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-759 avia-img-lazy-loading-not-759 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol1@2x.png\" alt='' title='Telecom_graphs_Comsol1@2x'  height=\"500\" width=\"1000\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol1@2x.png 1000w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol1@2x-300x150.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol1@2x-768x384.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol1@2x-705x353.png 705w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/a><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-l833e7ea-c473354428a66847f2cb6af26623bb2a '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><p style=\"text-align: center;\"><em>Simulated frequency response of a 8x15mm receiver built into a handset with leak tolerance.<\/em><\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-le767f9k-6a0a76c60d5535d8d80685a3873dbd30\">\n#top .hr.hr-invisible.av-le767f9k-6a0a76c60d5535d8d80685a3873dbd30{\nheight:30px;\n}\n<\/style>\n<div  class='hr av-le767f9k-6a0a76c60d5535d8d80685a3873dbd30 hr-invisible  avia-builder-el-61  el_after_av_textblock  el_before_av_image '><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-l833dvw1-26223e29e74f67b0c889160489e75521\">\n.avia-image-container.av-l833dvw1-26223e29e74f67b0c889160489e75521 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-26223e29e74f67b0c889160489e75521 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-26223e29e74f67b0c889160489e75521 av-styling- av-img-linked avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-62  el_after_av_hr  el_before_av_textblock '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><a href=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol2@2x.png\" data-srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol2@2x.png 1000w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol2@2x-300x150.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol2@2x-768x384.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol2@2x-705x353.png 705w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" class='avia_image '  aria-label='Telecom_graphs_Comsol2@2x'><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-758 avia-img-lazy-loading-not-758 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol2@2x.png\" alt='' title='Telecom_graphs_Comsol2@2x'  height=\"500\" width=\"1000\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol2@2x.png 1000w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol2@2x-300x150.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol2@2x-768x384.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_graphs_Comsol2@2x-705x353.png 705w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/a><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-l833e7ea-c473354428a66847f2cb6af26623bb2a '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><p style=\"text-align: center;\"><em>Normalized simulated frequency response of pressure on MEMS microphone using three different types of acoustic fabric to lower resonance peak at 4 kHz.<\/em><\/p>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-7f10c8f1519a3bc62f84680724142994\">\n#top .flex_column.av-fszce-7f10c8f1519a3bc62f84680724142994{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-fszce-7f10c8f1519a3bc62f84680724142994{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-fszce-7f10c8f1519a3bc62f84680724142994{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-7f10c8f1519a3bc62f84680724142994 av_one_half  avia-builder-el-64  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-sub-av-le75croh-e119a768d2912d6e26c30c828899d84b\">\n.av-hotspot-image-container .av-image-hotspot.av-nbuj9-cc291b9d5c9a96f6606c3d1ce228773f{\ntop:19.6%;\nleft:8.3%;\n}\n.av-hotspot-image-container .av-image-hotspot.av-nbuj9-cc291b9d5c9a96f6606c3d1ce228773f .av-image-hotspot_inner{\nbackground-color:#702423;\ncolor:#ffffff;\n}\n.av-hotspot-image-container .av-image-hotspot.av-d6g7p-12ef08204b6c9ae7735b017c48d3d89e{\ntop:83.9%;\nleft:46.7%;\n}\n.av-hotspot-image-container .av-image-hotspot.av-d6g7p-12ef08204b6c9ae7735b017c48d3d89e .av-image-hotspot_inner{\nbackground-color:#702423;\ncolor:#ffffff;\n}\n.av-hotspot-image-container .av-image-hotspot.av-9ty91-081c885b2e2c272e376903a4d04bcdd7{\ntop:42.1%;\nleft:24.2%;\n}\n.av-hotspot-image-container .av-image-hotspot.av-9ty91-081c885b2e2c272e376903a4d04bcdd7 .av-image-hotspot_inner{\nbackground-color:#702423;\ncolor:#ffffff;\n}\n.av-hotspot-image-container .av-image-hotspot.av-8ykmd-68304c2562f1dba1562591eb923ab12b{\ntop:9.3%;\nleft:78.4%;\n}\n.av-hotspot-image-container .av-image-hotspot.av-8ykmd-68304c2562f1dba1562591eb923ab12b .av-image-hotspot_inner{\nbackground-color:#702423;\ncolor:#ffffff;\n}\n<\/style>\n<div  class='av-hotspot-image-container av-le75croh-e119a768d2912d6e26c30c828899d84b  avia-builder-el-65  el_before_av_hr  avia-builder-el-first  av-hotspot-blank av-permanent-tooltip av-mobile-fallback-active  av-non-fullwidth-hotspot-image'  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class='av-hotspot-container'><div class='av-hotspot-container-inner-cell'><div class='av-hotspot-container-inner-wrap'><div class='av-image-hotspot av-nbuj9-cc291b9d5c9a96f6606c3d1ce228773f av-image-hotspot-1 av-permanent-tooltip' data-avia-tooltip-position='top' data-avia-tooltip-alignment='centered' data-avia-tooltip-class='av-tt-default-width av-tt-pos-above av-tt-align-centered  av-mobile-fallback-active  av-permanent-tooltip-single  transparent_dark av-tt-hotspot' data-avia-tooltip='&lt;h3&gt;Receiver&lt;\/h3&gt;\n'><div class='av-image-hotspot_inner'>1<\/div><div class='av-image-hotspot-pulse'><\/div><\/div><div class='av-image-hotspot av-d6g7p-12ef08204b6c9ae7735b017c48d3d89e av-image-hotspot-2 av-permanent-tooltip' data-avia-tooltip-position='left' data-avia-tooltip-alignment='centered' data-avia-tooltip-class='av-tt-default-width av-tt-pos-left av-tt-align-centered  av-mobile-fallback-active  av-permanent-tooltip-single  transparent_dark av-tt-hotspot' data-avia-tooltip='&lt;h3&gt;&lt;strong&gt;Microphone&lt;\/strong&gt;&lt;\/h3&gt;\n'><div class='av-image-hotspot_inner'>2<\/div><div class='av-image-hotspot-pulse'><\/div><\/div><div class='av-image-hotspot av-9ty91-081c885b2e2c272e376903a4d04bcdd7 av-image-hotspot-3 av-permanent-tooltip' data-avia-tooltip-position='left' data-avia-tooltip-alignment='centered' data-avia-tooltip-class='av-tt-default-width av-tt-pos-left av-tt-align-centered  av-mobile-fallback-active  av-permanent-tooltip-single  transparent_dark av-tt-hotspot' data-avia-tooltip='&lt;p&gt;Front leakage control paths&lt;\/p&gt;\n'><div class='av-image-hotspot_inner'>3<\/div><div class='av-image-hotspot-pulse'><\/div><\/div><div class='av-image-hotspot av-8ykmd-68304c2562f1dba1562591eb923ab12b av-image-hotspot-4 av-permanent-tooltip' data-avia-tooltip-position='right' data-avia-tooltip-alignment='centered' data-avia-tooltip-class='av-tt-default-width av-tt-pos-right av-tt-align-centered  av-mobile-fallback-active  av-permanent-tooltip-single  transparent_dark av-tt-hotspot' data-avia-tooltip='&lt;p&gt;Rear ventilation paths&lt;\/p&gt;\n'><div class='av-image-hotspot_inner'>4<\/div><div class='av-image-hotspot-pulse'><\/div><\/div><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-3956 avia-img-lazy-loading-not-3956 avia_image' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/Telecom_Comsol-1.png\" alt='' title='Telecom_Comsol'  height=\"600\" width=\"524\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/Telecom_Comsol-1.png 524w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/Telecom_Comsol-1-262x300.png 262w\" sizes=\"(max-width: 524px) 100vw, 524px\" \/><\/div><\/div><\/div><div class='av-hotspot-fallback-tooltip av-image-hotspot-1 av-permanent-tooltip'><div class=\"av-hotspot-fallback-tooltip-count\">1<div class=\"avia-arrow\"><\/div><\/div><div class=\"av-hotspot-fallback-tooltip-inner clearfix\"><\/p>\n<h3>Receiver<\/h3>\n<p>\n<\/div><\/div><div class='av-hotspot-fallback-tooltip av-image-hotspot-2 av-permanent-tooltip'><div class=\"av-hotspot-fallback-tooltip-count\">2<div class=\"avia-arrow\"><\/div><\/div><div class=\"av-hotspot-fallback-tooltip-inner clearfix\"><\/p>\n<h3><strong>Microphone<\/strong><\/h3>\n<p>\n<\/div><\/div><div class='av-hotspot-fallback-tooltip av-image-hotspot-3 av-permanent-tooltip'><div class=\"av-hotspot-fallback-tooltip-count\">3<div class=\"avia-arrow\"><\/div><\/div><div class=\"av-hotspot-fallback-tooltip-inner clearfix\"><p>\nFront leakage control paths<\/p>\n<\/div><\/div><div class='av-hotspot-fallback-tooltip av-image-hotspot-4 av-permanent-tooltip'><div class=\"av-hotspot-fallback-tooltip-count\">4<div class=\"avia-arrow\"><\/div><\/div><div class=\"av-hotspot-fallback-tooltip-inner clearfix\"><p>\nRear ventilation paths<\/p>\n<\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-le767f9k-015804b343717c4dd1bc487ca910113d\">\n#top .hr.hr-invisible.av-le767f9k-015804b343717c4dd1bc487ca910113d{\nheight:50px;\n}\n<\/style>\n<div  class='hr av-le767f9k-015804b343717c4dd1bc487ca910113d hr-invisible  avia-builder-el-66  el_after_av_image_hotspot  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 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av-lgp1l7bu-693a6058762f3d66c3899825d68126d3 av-link-btn avia-icon_select-yes-right-icon avia-size-large avia-position-center avia-color-light'   aria-label=\"Read more about simulation in Comsol Multiphysics\"><span class='avia_iconbox_title' >Read more about simulation in Comsol Multiphysics<\/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>\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='after_section_7'  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-957'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-09e5c0849f7fc2da1842db2f1f9fffea\">\n.flex_column.av-fszce-09e5c0849f7fc2da1842db2f1f9fffea{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-09e5c0849f7fc2da1842db2f1f9fffea av_one_full  avia-builder-el-68  el_after_av_section  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-le76dy8b-9ee76ac6c045415fef35c9f19fdbf302\">\n#top .av-special-heading.av-le76dy8b-9ee76ac6c045415fef35c9f19fdbf302{\nmargin:80px 0 0 0;\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-le76dy8b-9ee76ac6c045415fef35c9f19fdbf302 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-le76dy8b-9ee76ac6c045415fef35c9f19fdbf302 .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-le76dy8b-9ee76ac6c045415fef35c9f19fdbf302 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-le76dy8b-9ee76ac6c045415fef35c9f19fdbf302 .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-le76dy8b-9ee76ac6c045415fef35c9f19fdbf302 .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-le76dy8b-9ee76ac6c045415fef35c9f19fdbf302 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-le76dy8b-9ee76ac6c045415fef35c9f19fdbf302 av-special-heading-h2 custom-color-heading blockquote modern-quote modern-centered  avia-builder-el-69  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Measuring the real deal<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-l833e7ea-81683d0ecbc044cd0c01a6e8d06862a1 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center;\">The labs at Ole Wolff are equipped to measure all of the parameters necessary to verify that the handset complies with all of the telecom standards. We use artificial ears, HAC probes KEMAR dummy head with mechanical &#8220;hand&#8221;, and ear &amp; mouth simulator. The performance of the raw drivers are verified using Klippel\u2122 systems, Listen SoundCheck\u2122 and more.\u00a0 For hands-free audio the performance can be verified in anechoic chambers or by using Klippel\u2122 SCN Near Field Add-on.<\/p>\n<\/div><\/section><\/p><\/div>\n<div class='flex_column_table av-fszce-85335f58656352eebaae0cd77f8f7a3d 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-85335f58656352eebaae0cd77f8f7a3d\">\n#top .flex_column_table.av-equal-height-column-flextable.av-fszce-85335f58656352eebaae0cd77f8f7a3d{\nmargin-top:30px;\nmargin-bottom:0px;\n}\n.flex_column.av-fszce-85335f58656352eebaae0cd77f8f7a3d{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-85335f58656352eebaae0cd77f8f7a3d av_one_half  avia-builder-el-71  el_after_av_one_full  el_before_av_one_half  first flex_column_table_cell av-equal-height-column av-align-top av-zero-column-padding  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l833dvw1-f80382b9fcdede6b2015186aef87a917\">\n.avia-image-container.av-l833dvw1-f80382b9fcdede6b2015186aef87a917 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-f80382b9fcdede6b2015186aef87a917 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-f80382b9fcdede6b2015186aef87a917 av-styling- av-img-linked avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-72  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\"><a href=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x.jpeg\" data-srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x.jpeg 800w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x-300x300.jpeg 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x-80x80.jpeg 80w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x-768x768.jpeg 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x-36x36.jpeg 36w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x-180x180.jpeg 180w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x-705x705.jpeg 705w\" data-sizes=\"(max-width: 800px) 100vw, 800px\" class='avia_image '  aria-label='Telecom_testequip1@2x'><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-757 avia-img-lazy-loading-not-757 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x.jpeg\" alt='' title='Telecom_testequip1@2x'  height=\"800\" width=\"800\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x.jpeg 800w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x-300x300.jpeg 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x-80x80.jpeg 80w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x-768x768.jpeg 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x-36x36.jpeg 36w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x-180x180.jpeg 180w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip1@2x-705x705.jpeg 705w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a><\/div><\/div><\/div><\/div>\n<div class='av-flex-placeholder'><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-7f10c8f1519a3bc62f84680724142994\">\n#top 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avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-74  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\"><a href=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x.jpeg\" data-srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x.jpeg 800w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x-300x300.jpeg 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x-80x80.jpeg 80w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x-768x768.jpeg 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x-36x36.jpeg 36w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x-180x180.jpeg 180w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x-705x705.jpeg 705w\" data-sizes=\"(max-width: 800px) 100vw, 800px\" class='avia_image '  aria-label='Telecom_testequip2@2x'><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-756 avia-img-lazy-loading-not-756 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x.jpeg\" alt='' title='Telecom_testequip2@2x'  height=\"800\" width=\"800\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x.jpeg 800w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x-300x300.jpeg 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x-80x80.jpeg 80w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x-768x768.jpeg 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x-36x36.jpeg 36w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x-180x180.jpeg 180w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Telecom_testequip2@2x-705x705.jpeg 705w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a><\/div><\/div><\/div><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-09e5c0849f7fc2da1842db2f1f9fffea\">\n.flex_column.av-fszce-09e5c0849f7fc2da1842db2f1f9fffea{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-09e5c0849f7fc2da1842db2f1f9fffea av_one_third  avia-builder-el-75  el_after_av_one_half  el_before_av_one_third  first flex_column_div av-zero-column-padding  column-top-margin'     ><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-7f10c8f1519a3bc62f84680724142994\">\n.flex_column.av-fszce-7f10c8f1519a3bc62f84680724142994{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-7f10c8f1519a3bc62f84680724142994 av_one_third  avia-builder-el-76  el_after_av_one_third  el_before_av_one_third  flex_column_div av-zero-column-padding  column-top-margin'     ><div  class='avia-button-wrap av-l9ppnz62-5801336d560e919a06da505514f603e9-wrap avia-button-center  avia-builder-el-77  avia-builder-el-no-sibling  button-front-2'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l9ppnz62-5801336d560e919a06da505514f603e9\">\n#top #wrap_all .avia-button.av-l9ppnz62-5801336d560e919a06da505514f603e9{\ncolor:#bf4542;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-l9ppnz62-5801336d560e919a06da505514f603e9:hover{\nbackground-color:#ffffff;\ncolor:#ffffff;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-l9ppnz62-5801336d560e919a06da505514f603e9 .avia-svg-icon svg:first-child{\nfill:#bf4542;\nstroke:#bf4542;\n}\n#top #wrap_all .avia-button.av-l9ppnz62-5801336d560e919a06da505514f603e9:hover .avia-svg-icon svg:first-child{\nfill:#ffffff;\nstroke:#ffffff;\n}\n<\/style>\n<a href='https:\/\/owolff.com\/en\/application-support\/diaphragm-design\/'  class='avia-button av-l9ppnz62-5801336d560e919a06da505514f603e9 av-link-btn avia-icon_select-yes-right-icon avia-size-large avia-position-center avia-color-light'   aria-label=\"Read more about diaphragm design\"><span class='avia_iconbox_title' >Read more about diaphragm design<\/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><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-7f10c8f1519a3bc62f84680724142994\">\n.flex_column.av-fszce-7f10c8f1519a3bc62f84680724142994{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-7f10c8f1519a3bc62f84680724142994 av_one_third  avia-builder-el-78  el_after_av_one_third  el_before_av_section  avia-builder-el-last  flex_column_div av-zero-column-padding  column-top-margin'     ><\/div>\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-l9ppvvez-edafebfc8d7a707e7a33130584dae439\">\n.avia-section.av-l9ppvvez-edafebfc8d7a707e7a33130584dae439{\nbackground-color:#f9f9f9;\nbackground-image:unset;\n}\n<\/style>\n<div id='av_section_8'  class='avia-section av-l9ppvvez-edafebfc8d7a707e7a33130584dae439 main_color avia-section-default avia-no-border-styling  avia-builder-el-79  el_after_av_one_third  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-957'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1b1jk5-6fddab8c8720a2a60ae30a972dfd186e\">\n#top .flex_column.av-1b1jk5-6fddab8c8720a2a60ae30a972dfd186e{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-1b1jk5-6fddab8c8720a2a60ae30a972dfd186e{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-1b1jk5-6fddab8c8720a2a60ae30a972dfd186e{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-1b1jk5-6fddab8c8720a2a60ae30a972dfd186e av_one_half  avia-builder-el-80  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-bo8tp-091648a6e4235f4d7e96ecb05e44e69a\">\n#top .av-special-heading.av-bo8tp-091648a6e4235f4d7e96ecb05e44e69a{\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-bo8tp-091648a6e4235f4d7e96ecb05e44e69a .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-bo8tp-091648a6e4235f4d7e96ecb05e44e69a .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-bo8tp-091648a6e4235f4d7e96ecb05e44e69a .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-bo8tp-091648a6e4235f4d7e96ecb05e44e69a .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-bo8tp-091648a6e4235f4d7e96ecb05e44e69a .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-bo8tp-091648a6e4235f4d7e96ecb05e44e69a .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-bo8tp-091648a6e4235f4d7e96ecb05e44e69a av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-81  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Measuring the real deal<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-l833e7ea-8d3c95664978369b5a4707a2a473e424 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: left;\">When designing a speaker for hands-free operation the designer needs to consider:<\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l9ppzeyr-9251282dec3c3faa1ca39c90ebf7735e\">\n#top .avia-icon-list-container.av-l9ppzeyr-9251282dec3c3faa1ca39c90ebf7735e .iconlist_icon{\ncolor:#ffffff;\nbackground-color:#70140a;\nborder:1px solid #ffffff;\n}\n#top .avia-icon-list-container.av-l9ppzeyr-9251282dec3c3faa1ca39c90ebf7735e .iconlist_icon svg:first-child{\nstroke:#ffffff;\nfill:#ffffff;\n}\n.avia-icon-list-container.av-l9ppzeyr-9251282dec3c3faa1ca39c90ebf7735e .iconlist_content{\ncolor:#101010;\n}\n<\/style>\n<div  class='avia-icon-list-container av-l9ppzeyr-9251282dec3c3faa1ca39c90ebf7735e  avia-builder-el-83  el_after_av_textblock  el_before_av_textblock '><ul class='avia-icon-list avia_animate_when_almost_visible avia-icon-list-left av-iconlist-small av-l9ppzeyr-9251282dec3c3faa1ca39c90ebf7735e avia-iconlist-animate'>\n<li><div class='iconlist_icon av-146h9p-6e39c954ec7c72ca1c7ba44becff5001 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>Sensitivity (dBSPL @1W 1m)<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-uekad-0a96698cab595f9ebaaeb8763d803e8b 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>Front and rear volumes<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-otqcl-6204545d1466557b8ba330f3d9f64b0d 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>Front resonance (intended or unintended)<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-lopod-812412f2bbf6ff92961007399da936b1 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>Distortion (THD)<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-h540l-cc463178172a9194fb717e0f7164d005 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>Power consumption<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<\/ul><\/div><br \/>\n<section  class='av_textblock_section av-l833e7ea-81683d0ecbc044cd0c01a6e8d06862a1 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: left;\">Speakers for hands-free operation also need to comply with telecom standards.<\/p>\n<p style=\"text-align: left;\">Examples shown in the chart to the right.<\/p>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-8snnp-8f13189b4b95fc1ba334c098da7fde17\">\n#top .flex_column.av-8snnp-8f13189b4b95fc1ba334c098da7fde17{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-8snnp-8f13189b4b95fc1ba334c098da7fde17{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-8snnp-8f13189b4b95fc1ba334c098da7fde17{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-8snnp-8f13189b4b95fc1ba334c098da7fde17 av_one_half  avia-builder-el-85  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-l9ppxq08-51c2eeaab7802fb04089a544a0c4f5f1\">\n.avia-image-container.av-l9ppxq08-51c2eeaab7802fb04089a544a0c4f5f1 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l9ppxq08-51c2eeaab7802fb04089a544a0c4f5f1 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l9ppxq08-51c2eeaab7802fb04089a544a0c4f5f1 av-styling- avia-align-center  avia-builder-el-86  el_before_av_image  avia-builder-el-first '   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-788 avia-img-lazy-loading-not-788 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/ACFP_telecom@2x.png\" alt='' title='ACFP_telecom@2x'  height=\"250\" width=\"800\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/ACFP_telecom@2x.png 800w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/ACFP_telecom@2x-300x94.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/ACFP_telecom@2x-768x240.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/ACFP_telecom@2x-705x220.png 705w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l9ppxq08-300b816b3ba8478bbf182dbd06035dc8\">\n.avia-image-container.av-l9ppxq08-300b816b3ba8478bbf182dbd06035dc8 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l9ppxq08-300b816b3ba8478bbf182dbd06035dc8 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l9ppxq08-300b816b3ba8478bbf182dbd06035dc8 av-styling- avia-align-center  avia-builder-el-87  el_after_av_image  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-3976 avia-img-lazy-loading-not-3976 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/Telecom_handsfree@2x.png\" alt='' title='Telecom_handsfree@2x'  height=\"433\" width=\"982\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/Telecom_handsfree@2x.png 982w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/Telecom_handsfree@2x-300x132.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/Telecom_handsfree@2x-768x339.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/02\/Telecom_handsfree@2x-705x311.png 705w\" sizes=\"(max-width: 982px) 100vw, 982px\" \/><\/div><\/div><\/div><\/p><\/div><\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='av_section_9'  class='avia-section av-l9ppvvez-dba0500ea22c831ea72a68ead9f036ba main_color avia-section-default avia-no-border-styling  avia-builder-el-88  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-957'><div class='entry-content-wrapper clearfix'>\n<div class='flex_column_table av-1b1jk5-4458e86fb93680f24b3135565020f150 sc-av_one_half av-equal-height-column-flextable'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1b1jk5-4458e86fb93680f24b3135565020f150\">\n#top .flex_column_table.av-equal-height-column-flextable.av-1b1jk5-4458e86fb93680f24b3135565020f150{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-1b1jk5-4458e86fb93680f24b3135565020f150{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-1b1jk5-4458e86fb93680f24b3135565020f150 av_one_half  avia-builder-el-89  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-gtn7h-d3710253fcf6c148f45f89a03ccbc407\">\n#top .av-special-heading.av-gtn7h-d3710253fcf6c148f45f89a03ccbc407{\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-gtn7h-d3710253fcf6c148f45f89a03ccbc407 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-gtn7h-d3710253fcf6c148f45f89a03ccbc407 .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-gtn7h-d3710253fcf6c148f45f89a03ccbc407 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-gtn7h-d3710253fcf6c148f45f89a03ccbc407 .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-gtn7h-d3710253fcf6c148f45f89a03ccbc407 .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-gtn7h-d3710253fcf6c148f45f89a03ccbc407 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-gtn7h-d3710253fcf6c148f45f89a03ccbc407 av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-90  el_before_av_iconlist  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Ole Wolff telecom receivers, speakers and design support<\/h2><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-l9ppzeyr-9251282dec3c3faa1ca39c90ebf7735e\">\n#top .avia-icon-list-container.av-l9ppzeyr-9251282dec3c3faa1ca39c90ebf7735e .iconlist_icon{\ncolor:#ffffff;\nbackground-color:#70140a;\nborder:1px solid #ffffff;\n}\n#top .avia-icon-list-container.av-l9ppzeyr-9251282dec3c3faa1ca39c90ebf7735e .iconlist_icon svg:first-child{\nstroke:#ffffff;\nfill:#ffffff;\n}\n.avia-icon-list-container.av-l9ppzeyr-9251282dec3c3faa1ca39c90ebf7735e .iconlist_content{\ncolor:#101010;\n}\n<\/style>\n<div  class='avia-icon-list-container av-l9ppzeyr-9251282dec3c3faa1ca39c90ebf7735e  avia-builder-el-91  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-l9ppzeyr-9251282dec3c3faa1ca39c90ebf7735e avia-iconlist-animate'>\n<li><div class='iconlist_icon av-r2xyl-b01eb6e6d02c3b9a5ddbc283d452ec5b 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>Circular receivers for larger handsets<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-mria5-e757f40c99b944a324b9d22a491b3e1c 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>Rectangular receivers for smaller handsets<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-ct0f1-449f6206ec3996c6457843e5369a48db 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>Various speakers suitable for hands-free operation<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-8zx8d-2efc4d8fefb7e4abe1d9e5daa23b2fac 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>Performance optimization using state-of-the-art tools<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div 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img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l9ppxq08-b810fb43044c91471f063147b9965595 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l9ppxq08-b810fb43044c91471f063147b9965595 av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-93  el_before_av_textblock  avia-builder-el-first '   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-753 avia-img-lazy-loading-not-753 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/OWR-3083T-150WB@2x-300x300.jpeg\" alt='' title='OWR-3083T-150WB@2x'  height=\"300\" width=\"300\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/OWR-3083T-150WB@2x-300x300.jpeg 300w, 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Autoclose: 1 -->\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-eg59x-e3e44853394e4f019cb4df1d2ba8e620\">\n.flex_column.av-eg59x-e3e44853394e4f019cb4df1d2ba8e620{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-eg59x-e3e44853394e4f019cb4df1d2ba8e620 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'     ><div  class='avia-button-wrap av-l9ppnz62-51f9d632e95d21707fbc858b19679444-wrap avia-button-center  avia-builder-el-96  avia-builder-el-no-sibling  button-front-2'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l9ppnz62-51f9d632e95d21707fbc858b19679444\">\n#top #wrap_all .avia-button.av-l9ppnz62-51f9d632e95d21707fbc858b19679444{\ncolor:#bf4542;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all 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avia-builder-el-100  el_before_av_one_half  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Do you want to know more about Telecom Handsets<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-12zvyu-00e67e12af68c73fd173963722733b47\">\n#top .flex_column.av-12zvyu-00e67e12af68c73fd173963722733b47{\nmargin-top:30px;\nmargin-bottom:0px;\n}\n.flex_column.av-12zvyu-00e67e12af68c73fd173963722733b47{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-12zvyu-00e67e12af68c73fd173963722733b47{\nmargin-top:30px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-12zvyu-00e67e12af68c73fd173963722733b47 av_one_half  avia-builder-el-101  el_after_av_heading  el_before_av_one_half  first flex_column_div av-zero-column-padding  '     ><section  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