{"id":610,"date":"2022-10-05T08:49:20","date_gmt":"2022-10-05T08:49:20","guid":{"rendered":"https:\/\/owolff.com.linux20.curanetserver.dk\/?page_id=610"},"modified":"2024-10-03T13:26:19","modified_gmt":"2024-10-03T11:26:19","slug":"audio-in-smart-glasses","status":"publish","type":"page","link":"https:\/\/owolff.com\/en\/application-support\/audio-in-smart-glasses\/","title":{"rendered":"Audio in smart glasses"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lcg9ppdn-5eaf334e8cf759af7a64857767540e6e\">\n.avia-section.av-lcg9ppdn-5eaf334e8cf759af7a64857767540e6e{\nmargin-bottom:0px;\n}\n.avia-section.av-lcg9ppdn-5eaf334e8cf759af7a64857767540e6e .av-parallax .av-parallax-inner{\nbackground-color:#702423;\nbackground-image:url(https:\/\/owolff.com\/wp-content\/uploads\/2022\/09\/SMART-glasses.jpg);\nbackground-repeat:no-repeat;\nbackground-position:50% 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class='av-special-heading-tag '  itemprop=\"headline\"  >Audio in Smart glasses<\/h1><div class='av_custom_color av-subheading av-subheading_below'><p>Optimized using advanced simulation and measurement tools<\/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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type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ldvqfvcs-ccf635a98ed6c3c9839ebdc7f98b4555\">\n#top .av-special-heading.av-ldvqfvcs-ccf635a98ed6c3c9839ebdc7f98b4555{\nmargin:80px 0 0 0;\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-ldvqfvcs-ccf635a98ed6c3c9839ebdc7f98b4555 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-ldvqfvcs-ccf635a98ed6c3c9839ebdc7f98b4555 .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-ldvqfvcs-ccf635a98ed6c3c9839ebdc7f98b4555 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-ldvqfvcs-ccf635a98ed6c3c9839ebdc7f98b4555 .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-ldvqfvcs-ccf635a98ed6c3c9839ebdc7f98b4555 .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-ldvqfvcs-ccf635a98ed6c3c9839ebdc7f98b4555 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-ldvqfvcs-ccf635a98ed6c3c9839ebdc7f98b4555 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\"  >Glasses with extra features<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-ldub3kd3-a1e20ee64897b86a71856b18cd3622da '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Glasses with built-in screens, cameras and &#8211; most importantly &#8211; loudspeakers are appearing on the market. These types of devices allow the user to perform many of same tasks as they would on a portable device (phone\/tablet) while having hands free for other tasks. These pages specifically deal with the audio part of the smart glasses, where loudspeakers are placed in the temples as close to the ear entrance as possible in order to deliver the best sound. The speakers&#8217; job is to direct sound waves towards the user&#8217;s ear while the ears remains unoccluded, allowing the user to hear the surroundings while listening to audio at the same time. This is where Ole Wolff&#8217;s expertise in maximizing sound performance from tiny enclosures can make a notable difference.<\/p>\n<\/div><\/section><\/p><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-3ycxr-d1f7bc7116088ae3a23b173910065b69\">\n.avia-section.av-3ycxr-d1f7bc7116088ae3a23b173910065b69{\nbackground-color:#f9f9f9;\nbackground-image:unset;\n}\n<\/style>\n<div id='av_section_3'  class='avia-section av-3ycxr-d1f7bc7116088ae3a23b173910065b69 main_color avia-section-large avia-no-border-styling  avia-builder-el-8  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-610'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1170y2-75bf0bd26eaf461eb284885ad18e1153\">\n#top .av-special-heading.av-1170y2-75bf0bd26eaf461eb284885ad18e1153{\nmargin:80px 0 0 0;\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-1170y2-75bf0bd26eaf461eb284885ad18e1153 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-1170y2-75bf0bd26eaf461eb284885ad18e1153 .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-1170y2-75bf0bd26eaf461eb284885ad18e1153 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-1170y2-75bf0bd26eaf461eb284885ad18e1153 .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-1170y2-75bf0bd26eaf461eb284885ad18e1153 .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-1170y2-75bf0bd26eaf461eb284885ad18e1153 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-1170y2-75bf0bd26eaf461eb284885ad18e1153 av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-9  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Sound in the near field<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n<section  class='av_textblock_section av-ldub3kd3-24-3b92d71ded70260fc63cab5f456bb553 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Compared to earphones and headsets, which are positioned in the ear canal or directly onto the ear, the loudspeakers in smart glasses are situated in a so called near field related to the ear entrance. Therefore the tuning of the acoustic parameters are quite different from ear- and headphones, both in repects of desired frequency response and loudness. The acoustic impedance &#8220;seen&#8221; by a near field driver is very different from the in-ear impedance, which is why it takes much larger driver to produce a satisfying bass response compared to sealed earphones.<\/p>\n<\/div><\/section>\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_after_av_textblock  el_before_av_one_half  first flex_column_table_cell av-equal-height-column av-align-top av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lg505w-3859f06559011bd9d0aea594597567ad\">\n.avia-image-container.av-l8lg505w-3859f06559011bd9d0aea594597567ad img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l8lg505w-3859f06559011bd9d0aea594597567ad .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l8lg505w-3859f06559011bd9d0aea594597567ad av-styling- avia-align-center  avia-builder-el-12  el_before_av_hr  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-613 avia-img-lazy-loading-not-613 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-chamber.png\" alt='' title='smart glasses acoustic chamber'  height=\"700\" width=\"900\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-chamber.png 900w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-chamber-300x233.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-chamber-768x597.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-chamber-705x548.png 705w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8vdhf8t-3db4fce7dd3051df6a877e569d3949ca\">\n#top .hr.hr-invisible.av-l8vdhf8t-3db4fce7dd3051df6a877e569d3949ca{\nheight:50px;\n}\n<\/style>\n<div  class='hr av-l8vdhf8t-3db4fce7dd3051df6a877e569d3949ca hr-invisible  avia-builder-el-13  el_after_av_image  el_before_av_textblock '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<section  class='av_textblock_section av-l8lg3s76-175343abf013a665c2e01f2ced50e5c5 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><div class=\"sectionintro\">\n<h3 class=\"OverskriftH4\">Stuffing the temple<\/h3>\n<\/div>\n<div class=\"BrdtekstFutura\">Along with all of the electronics, battery etc. neccesary to make the glasses &#8220;smart&#8221;, the temple also has to contain the driver with the tuned front and rear cavities. Every mm^3 counts and even what may seem as minor adjustments can have a huge impact on the resulting sound performance.<\/div>\n<\/div><\/section><\/p><\/div><div class='av-flex-placeholder'><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-8sncl-d2e0d17af8cf3a0230ade0f00356cc21\">\n#top .flex_column_table.av-equal-height-column-flextable.av-8sncl-d2e0d17af8cf3a0230ade0f00356cc21{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-8sncl-d2e0d17af8cf3a0230ade0f00356cc21{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-8sncl-d2e0d17af8cf3a0230ade0f00356cc21 av_one_half  avia-builder-el-15  el_after_av_one_half  el_before_av_one_half  flex_column_table_cell av-equal-height-column av-align-top av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lg505w-21-76a61b183ff99bf4a2af289645aa63e9\">\n.avia-image-container.av-l8lg505w-21-76a61b183ff99bf4a2af289645aa63e9 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l8lg505w-21-76a61b183ff99bf4a2af289645aa63e9 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l8lg505w-21-76a61b183ff99bf4a2af289645aa63e9 av-styling- avia-align-center  avia-builder-el-16  el_before_av_hr  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-614 avia-img-lazy-loading-not-614 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-frequency.png\" alt='' title='Audio in Smart glasses'  height=\"700\" width=\"900\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-frequency.png 900w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-frequency-300x233.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-frequency-768x597.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-frequency-705x548.png 705w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8vdhf8t-20-8ae91542d2059cc8cf452b8539629396\">\n#top .hr.hr-invisible.av-l8vdhf8t-20-8ae91542d2059cc8cf452b8539629396{\nheight:50px;\n}\n<\/style>\n<div  class='hr av-l8vdhf8t-20-8ae91542d2059cc8cf452b8539629396 hr-invisible  avia-builder-el-17  el_after_av_image  el_before_av_textblock '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<section  class='av_textblock_section av-l8lg3s76-19-fe0cce36cb2c9503c54fe8378264aa5e '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>The tuning has to account for reflections coming from the head as well as low frequency cancellation caused by sound waves from the rear side of the loudspeaker&#8217;s diaphragm that can reach the ear through a rear vent. Such rear vent can be necessary if there is not enough space in the temples for a large enough air volume behind the speaker to allow for a decent bass content, but the placement of the vent is critical to avoid cancellations. Using simulations various port placements can be tested without the need for physical prototypes.<\/p>\n<\/div><\/section><\/p><\/div><\/div><!--close column table wrapper. Autoclose: 1 --><div class='flex_column_table av-gwrjx-22-226e78ee34edcc0ed99508d65db1414d 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-22-226e78ee34edcc0ed99508d65db1414d\">\n#top .flex_column_table.av-equal-height-column-flextable.av-gwrjx-22-226e78ee34edcc0ed99508d65db1414d{\nmargin-bottom:0px;\n}\n.flex_column.av-gwrjx-22-226e78ee34edcc0ed99508d65db1414d{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-gwrjx-22-226e78ee34edcc0ed99508d65db1414d av_one_half  avia-builder-el-19  el_after_av_one_half  el_before_av_one_half  first flex_column_table_cell av-equal-height-column av-align-top av-zero-column-padding  column-top-margin'     ><div  class='avia-button-wrap av-lgp02b5z-c2e69213fccc5b19f23b7798647a845d-wrap avia-button-center  avia-builder-el-20  avia-builder-el-no-sibling  button-front-2'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lgp02b5z-c2e69213fccc5b19f23b7798647a845d\">\n#top #wrap_all .avia-button.av-lgp02b5z-c2e69213fccc5b19f23b7798647a845d{\ncolor:#bf4542;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-c2e69213fccc5b19f23b7798647a845d:hover{\nbackground-color:#f9f9f9;\ncolor:#ffffff;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-c2e69213fccc5b19f23b7798647a845d .avia-svg-icon svg:first-child{\nfill:#bf4542;\nstroke:#bf4542;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-c2e69213fccc5b19f23b7798647a845d:hover .avia-svg-icon svg:first-child{\nfill:#ffffff;\nstroke:#ffffff;\n}\n<\/style>\n<a href='https:\/\/owolff.com\/en\/application-support\/speaker-system-design\/'  class='avia-button av-lgp02b5z-c2e69213fccc5b19f23b7798647a845d av-link-btn avia-icon_select-yes-right-icon avia-size-large avia-position-center avia-color-light'   aria-label=\"Read more about speaker system design\"><span class='avia_iconbox_title' >Read more about speaker system 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><div class='av-flex-placeholder'><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-gwrjx-17-964ffd41cdb55f4c34f555b99c3cfdee\">\n#top .flex_column_table.av-equal-height-column-flextable.av-gwrjx-17-964ffd41cdb55f4c34f555b99c3cfdee{\nmargin-bottom:0px;\n}\n.flex_column.av-gwrjx-17-964ffd41cdb55f4c34f555b99c3cfdee{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-gwrjx-17-964ffd41cdb55f4c34f555b99c3cfdee av_one_half  avia-builder-el-21  el_after_av_one_half  avia-builder-el-last  flex_column_table_cell av-equal-height-column av-align-top av-zero-column-padding  column-top-margin'     ><div  class='avia-button-wrap av-lgp02b5z-16-4389abacef63cc40be256206f2753bfc-wrap avia-button-center  avia-builder-el-22  avia-builder-el-no-sibling  button-front-2'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lgp02b5z-16-4389abacef63cc40be256206f2753bfc\">\n#top #wrap_all .avia-button.av-lgp02b5z-16-4389abacef63cc40be256206f2753bfc{\ncolor:#bf4542;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-16-4389abacef63cc40be256206f2753bfc:hover{\nbackground-color:#f9f9f9;\ncolor:#ffffff;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-16-4389abacef63cc40be256206f2753bfc .avia-svg-icon svg:first-child{\nfill:#bf4542;\nstroke:#bf4542;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-16-4389abacef63cc40be256206f2753bfc:hover .avia-svg-icon svg:first-child{\nfill:#ffffff;\nstroke:#ffffff;\n}\n<\/style>\n<a href='https:\/\/owolff.com\/en\/application-support\/transducer-design\/'  class='avia-button av-lgp02b5z-16-4389abacef63cc40be256206f2753bfc av-link-btn avia-icon_select-yes-right-icon avia-size-large avia-position-center avia-color-light'   aria-label=\"Read more about Transducer design\"><span class='avia_iconbox_title' >Read more about Transducer 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><\/div><!--close column table wrapper. Autoclose: 1 -->\n\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='av_section_4'  class='avia-section av-9qn5m-132f0da06d175bf28be5cf324cb78000 main_color avia-section-default avia-no-border-styling  avia-builder-el-23  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-610'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-k5gze-030b9d1ce24c7e40bc4e311b623e0935\">\n#top .flex_column.av-k5gze-030b9d1ce24c7e40bc4e311b623e0935{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-k5gze-030b9d1ce24c7e40bc4e311b623e0935{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all 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.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-ugfx6-aac255a17cd7a2245ce5c0e6c50937c6 .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-ugfx6-aac255a17cd7a2245ce5c0e6c50937c6 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-ugfx6-aac255a17cd7a2245ce5c0e6c50937c6 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\"  >Simulations<\/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-ldub3kd3-23-88163a39a4b0ffa0b6a1dd2af92c0ca3\">\n#top .av_textblock_section.av-ldub3kd3-23-88163a39a4b0ffa0b6a1dd2af92c0ca3 .avia_textblock{\ncolor:#101010;\n}\n<\/style>\n<section  class='av_textblock_section av-ldub3kd3-23-88163a39a4b0ffa0b6a1dd2af92c0ca3 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><p>Ole Wolff uses a model of a dummy head and a detailed human ear similar to Head &amp; Torso simulators found in our labs.<\/p>\n<p>Typically the driver is modelled using Thiele-Small parameters to keep computation time down but full mechanical models can also be used.<br \/>\nThe air volumes surrounding the driver and the holes, leakages and meshes to the outside world are modelled and so is skin- and eardrum impedance of the head.<\/p>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-886ia-362457c7cc677a8483e0747d0750f0e6\">\n#top 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class='avia-button av-lgp02b5z-15-cd89fa84c2b8a4b037c6aa1b6d5d09fc 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><div class='flex_column_table av-11yvf7-ea6a346f0d789c652dbaccab71b26c64 sc-av_one_half av-equal-height-column-flextable'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-11yvf7-ea6a346f0d789c652dbaccab71b26c64\">\n#top .flex_column_table.av-equal-height-column-flextable.av-11yvf7-ea6a346f0d789c652dbaccab71b26c64{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-11yvf7-ea6a346f0d789c652dbaccab71b26c64{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-11yvf7-ea6a346f0d789c652dbaccab71b26c64 av_one_half  avia-builder-el-30  el_after_av_one_third  el_before_av_one_half  first flex_column_table_cell av-equal-height-column av-align-top av-animated-generic bottom-to-top av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lg505w-18-f4927caeefc5e17ee2ec195a8daf12f7\">\n.avia-image-container.av-l8lg505w-18-f4927caeefc5e17ee2ec195a8daf12f7 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l8lg505w-18-f4927caeefc5e17ee2ec195a8daf12f7 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l8lg505w-18-f4927caeefc5e17ee2ec195a8daf12f7 av-styling- avia-align-center  avia-builder-el-31  el_before_av_image  avia-builder-el-first '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div 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img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-110ssv-3514b3030c5931cd3d0ee37ef7b692f1 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-110ssv-3514b3030c5931cd3d0ee37ef7b692f1 av-styling-no-styling av-img-linked avia-align-center  avia-builder-el-32  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- avia-img-lazy-loading-not- avia_image ' src=\"http:\/\/test.kriesi.at\/construction\/wp-content\/uploads\/sites\/7\/2015\/10\/scale-ruler-on-blueprints-845x321.jpg\" alt='' title=''   itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><\/p><\/div><div class='av-flex-placeholder'><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-11yvf7-13-c493db76c8e43d1924d403718038af93\">\n#top .flex_column_table.av-equal-height-column-flextable.av-11yvf7-13-c493db76c8e43d1924d403718038af93{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-11yvf7-13-c493db76c8e43d1924d403718038af93{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-11yvf7-13-c493db76c8e43d1924d403718038af93 av_one_half  avia-builder-el-33  el_after_av_one_half  avia-builder-el-last  flex_column_table_cell av-equal-height-column av-align-top av-animated-generic bottom-to-top av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8lg505w-12-eef563f9754e2402d7c90bc779618bca\">\n.avia-image-container.av-l8lg505w-12-eef563f9754e2402d7c90bc779618bca img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l8lg505w-12-eef563f9754e2402d7c90bc779618bca .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l8lg505w-12-eef563f9754e2402d7c90bc779618bca av-styling- avia-align-center  avia-builder-el-34  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-611 avia-img-lazy-loading-not-611 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/acoustic-simulation_smart-glasses.png\" alt='' title='acoustic simulation_smart glasses'  height=\"700\" width=\"900\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/acoustic-simulation_smart-glasses.png 900w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/acoustic-simulation_smart-glasses-300x233.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/acoustic-simulation_smart-glasses-768x597.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/acoustic-simulation_smart-glasses-705x548.png 705w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-110ssv-11-689fabb44b73d29bd40eff57a158fbd3\">\n.avia-image-container.av-110ssv-11-689fabb44b73d29bd40eff57a158fbd3 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-110ssv-11-689fabb44b73d29bd40eff57a158fbd3 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-110ssv-11-689fabb44b73d29bd40eff57a158fbd3 av-styling-no-styling av-img-linked avia-align-center  avia-builder-el-35  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- avia-img-lazy-loading-not- avia_image ' src=\"http:\/\/test.kriesi.at\/construction\/wp-content\/uploads\/sites\/7\/2015\/10\/scale-ruler-on-blueprints-845x321.jpg\" alt='' title=''   itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><\/p><\/div><\/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-11zfbm-dbc5595b6115f36ba74ca53556590ce7\">\n.avia-section.av-11zfbm-dbc5595b6115f36ba74ca53556590ce7{\nbackground-color:#f9f9f9;\nbackground-image:unset;\n}\n<\/style>\n<div id='av_section_5'  class='avia-section av-11zfbm-dbc5595b6115f36ba74ca53556590ce7 main_color avia-section-default avia-no-border-styling  avia-builder-el-36  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-610'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-w9cca-434790fdfe96375c310425899e257213\">\n#top .flex_column.av-w9cca-434790fdfe96375c310425899e257213{\nmargin-top:80px;\n}\n.flex_column.av-w9cca-434790fdfe96375c310425899e257213{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-w9cca-434790fdfe96375c310425899e257213{\nmargin-top:80px;\n}\n<\/style>\n<div  class='flex_column av-w9cca-434790fdfe96375c310425899e257213 av_one_half  avia-builder-el-37  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-qx5cy-3cc5cff92ced81473b158fc8ef54b7d0\">\n#top .av-special-heading.av-qx5cy-3cc5cff92ced81473b158fc8ef54b7d0{\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-qx5cy-3cc5cff92ced81473b158fc8ef54b7d0 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-qx5cy-3cc5cff92ced81473b158fc8ef54b7d0 .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-qx5cy-3cc5cff92ced81473b158fc8ef54b7d0 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-qx5cy-3cc5cff92ced81473b158fc8ef54b7d0 .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-qx5cy-3cc5cff92ced81473b158fc8ef54b7d0 .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-qx5cy-3cc5cff92ced81473b158fc8ef54b7d0 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-qx5cy-3cc5cff92ced81473b158fc8ef54b7d0 av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-38  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Changing speaker properties<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-ldvos2l9-8946bbd4ef3530c59706353f22cdb5d0 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Using a virtual model allows for trying different speakers by changing the associated speaker parameters. This can speed up the development process considerably compared to building physical prototypes.<\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ldvowwrj-ed424cc8020281b90e1c03ae1d757a49\">\n#top .hr.hr-invisible.av-ldvowwrj-ed424cc8020281b90e1c03ae1d757a49{\nheight:30px;\n}\n<\/style>\n<div  class='hr av-ldvowwrj-ed424cc8020281b90e1c03ae1d757a49 hr-invisible  avia-builder-el-40  el_after_av_textblock  el_before_av_button '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<div  class='avia-button-wrap av-lgp02b5z-14-c2d242de3bb2f73dce45a743ba527276-wrap avia-button-center  avia-builder-el-41  el_after_av_hr  avia-builder-el-last  button-front-2'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lgp02b5z-14-c2d242de3bb2f73dce45a743ba527276\">\n#top #wrap_all .avia-button.av-lgp02b5z-14-c2d242de3bb2f73dce45a743ba527276{\ncolor:#bf4542;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-14-c2d242de3bb2f73dce45a743ba527276:hover{\nbackground-color:#f9f9f9;\ncolor:#ffffff;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-14-c2d242de3bb2f73dce45a743ba527276 .avia-svg-icon svg:first-child{\nfill:#bf4542;\nstroke:#bf4542;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-14-c2d242de3bb2f73dce45a743ba527276:hover .avia-svg-icon svg:first-child{\nfill:#ffffff;\nstroke:#ffffff;\n}\n<\/style>\n<a href='https:\/\/owolff.com\/en\/application-support\/simulation-in-comsol-multiphysics\/'  class='avia-button av-lgp02b5z-14-c2d242de3bb2f73dce45a743ba527276 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<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-p6hyi-bbed2d5b4d5fa97c59c6f138623afcb2\">\n#top .flex_column.av-p6hyi-bbed2d5b4d5fa97c59c6f138623afcb2{\nmargin-top:80px;\n}\n.flex_column.av-p6hyi-bbed2d5b4d5fa97c59c6f138623afcb2{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-p6hyi-bbed2d5b4d5fa97c59c6f138623afcb2{\nmargin-top:80px;\n}\n<\/style>\n<div  class='flex_column av-p6hyi-bbed2d5b4d5fa97c59c6f138623afcb2 av_one_half  avia-builder-el-42  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-ldvouinu-0aac28512dc08df18c7359075fd663b8\">\n.avia-image-container.av-ldvouinu-0aac28512dc08df18c7359075fd663b8 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-ldvouinu-0aac28512dc08df18c7359075fd663b8 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-ldvouinu-0aac28512dc08df18c7359075fd663b8 av-styling- avia-align-center  avia-builder-el-43  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-617 avia-img-lazy-loading-not-617 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Smart-glasses-speaker.png\" alt='smart glasses speaker' title='smart glasses speaker'  height=\"327\" width=\"429\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Smart-glasses-speaker.png 429w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Smart-glasses-speaker-300x229.png 300w\" sizes=\"(max-width: 429px) 100vw, 429px\" \/><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-ldvovr7l-56584eeb13177b739c732a33698c0a3b '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><em>Example of Thiele-Small data of a 8x15mm speaker used in a pair of glasses with a built-in speaker.<\/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-7e6b176daebe29e6a6c6b62c6295441f\">\n.avia-section.av-akx4r-7e6b176daebe29e6a6c6b62c6295441f{\nbackground-color:#ffffff;\nbackground-image:unset;\n}\n<\/style>\n<div id='1'  class='avia-section av-akx4r-7e6b176daebe29e6a6c6b62c6295441f main_color avia-section-large avia-no-border-styling  avia-builder-el-45  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-610'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-biw9y-8ada971d391c657aaf1403ad9ad46033\">\n#top .flex_column.av-biw9y-8ada971d391c657aaf1403ad9ad46033{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n.flex_column.av-biw9y-8ada971d391c657aaf1403ad9ad46033{\nborder-width:1px;\nborder-color:#e2e2e2;\nborder-style:solid;\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-biw9y-8ada971d391c657aaf1403ad9ad46033{\nmargin-top:80px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-biw9y-8ada971d391c657aaf1403ad9ad46033 av_one_half  avia-builder-el-46  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-l833dvw1-8b71ea1c15908070a9bf2b17c5742b5a\">\n.avia-image-container.av-l833dvw1-8b71ea1c15908070a9bf2b17c5742b5a img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-8b71ea1c15908070a9bf2b17c5742b5a .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-8b71ea1c15908070a9bf2b17c5742b5a av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-47  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-615 avia-img-lazy-loading-not-615 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-simulation-comsol.png\" alt='head and torso simulator' title='head and torso simulator'  height=\"700\" width=\"900\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-simulation-comsol.png 900w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-simulation-comsol-300x233.png 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-simulation-comsol-768x597.png 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/smart-glasses-acoustic-simulation-comsol-705x548.png 705w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-ldvovr7l-9-e112652083a609260341a90b1a572ceb '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><em>A head and torso simulator (HATS) is being used to measure the acoustic performance of the speaker glasses.<\/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-49  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-lb47m-9fba2cc7e0879c6eb24acbeac5c1ac7c\">\n#top .av-special-heading.av-lb47m-9fba2cc7e0879c6eb24acbeac5c1ac7c{\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-lb47m-9fba2cc7e0879c6eb24acbeac5c1ac7c .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-lb47m-9fba2cc7e0879c6eb24acbeac5c1ac7c .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-lb47m-9fba2cc7e0879c6eb24acbeac5c1ac7c .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-lb47m-9fba2cc7e0879c6eb24acbeac5c1ac7c .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-lb47m-9fba2cc7e0879c6eb24acbeac5c1ac7c .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-lb47m-9fba2cc7e0879c6eb24acbeac5c1ac7c .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-lb47m-9fba2cc7e0879c6eb24acbeac5c1ac7c av-special-heading-h2 custom-color-heading blockquote modern-quote  avia-builder-el-50  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-00d27fdca26855d6768d7516951f9891 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>A satisfying acoustic performance is always the ultimate goal. Objective performance is tested using a head and torso simulator (HATS) and subjective performance is evaluated by both the end customer and our engineers.<\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8vec1zq-1569cd15686fd3687657dbe134165f65\">\n#top .hr.hr-invisible.av-l8vec1zq-1569cd15686fd3687657dbe134165f65{\nheight:30px;\n}\n<\/style>\n<div  class='hr av-l8vec1zq-1569cd15686fd3687657dbe134165f65 hr-invisible  avia-builder-el-52  el_after_av_textblock  el_before_av_button '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<div  class='avia-button-wrap av-lgp02b5z-10-ef548b89b5bda74ff4e238ac588554a8-wrap avia-button-center  avia-builder-el-53  el_after_av_hr  avia-builder-el-last  button-front-2'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lgp02b5z-10-ef548b89b5bda74ff4e238ac588554a8\">\n#top #wrap_all .avia-button.av-lgp02b5z-10-ef548b89b5bda74ff4e238ac588554a8{\ncolor:#bf4542;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-10-ef548b89b5bda74ff4e238ac588554a8:hover{\nbackground-color:#ffffff;\ncolor:#ffffff;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-10-ef548b89b5bda74ff4e238ac588554a8 .avia-svg-icon svg:first-child{\nfill:#bf4542;\nstroke:#bf4542;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-10-ef548b89b5bda74ff4e238ac588554a8:hover .avia-svg-icon svg:first-child{\nfill:#ffffff;\nstroke:#ffffff;\n}\n<\/style>\n<a href='https:\/\/owolff.com\/en\/application-support\/headphones-and-earphones\/'  class='avia-button av-lgp02b5z-10-ef548b89b5bda74ff4e238ac588554a8 av-link-btn avia-icon_select-yes-right-icon avia-size-large avia-position-center avia-color-light'   aria-label=\"Read more about headphone design\"><span class='avia_iconbox_title' >Read more about headphone 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><\/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-8-b5cbeaf3703a49480500b871f45f529f\">\n.avia-section.av-akx4r-8-b5cbeaf3703a49480500b871f45f529f{\nbackground-color:#f9f9f9;\nbackground-image:unset;\n}\n<\/style>\n<div id='2'  class='avia-section av-akx4r-8-b5cbeaf3703a49480500b871f45f529f main_color avia-section-large avia-no-border-styling  avia-builder-el-54  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-610'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fi5u2-e141503c7841464cf7cbb9acab4485b8\">\n#top .av-special-heading.av-fi5u2-e141503c7841464cf7cbb9acab4485b8{\nmargin:80px 0 0 0;\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-fi5u2-e141503c7841464cf7cbb9acab4485b8 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-fi5u2-e141503c7841464cf7cbb9acab4485b8 .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-fi5u2-e141503c7841464cf7cbb9acab4485b8 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-fi5u2-e141503c7841464cf7cbb9acab4485b8 .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-fi5u2-e141503c7841464cf7cbb9acab4485b8 .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-fi5u2-e141503c7841464cf7cbb9acab4485b8 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-fi5u2-e141503c7841464cf7cbb9acab4485b8 av-special-heading-h2 custom-color-heading blockquote modern-quote modern-centered  avia-builder-el-55  el_before_av_textblock  avia-builder-el-first  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Choosing an appropriate driver<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n<section  class='av_textblock_section av-l833e7ea-5-cfed1017b3bf97526554a1c08b4875e7 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>When designing a pair of smart glasses it is tempting to choose as small a driver as possible to keep the overall thickness of the temples down. However, the laws of physics still apply no matter <i>how <\/i>smart the smart glasses are. In order to get as much &#8220;bass&#8221; frequencies as possible, a certain volume of air must be moved which, in general, correlates with both the diameter and the thickness of the chosen driver. Other important parameters to consider are:<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-6-d60a4786e4dd9753457b2bae9e004829\">\n#top .flex_column.av-fszce-6-d60a4786e4dd9753457b2bae9e004829{\nmargin-top:30px;\nmargin-bottom:0px;\n}\n.flex_column.av-fszce-6-d60a4786e4dd9753457b2bae9e004829{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-fszce-6-d60a4786e4dd9753457b2bae9e004829{\nmargin-top:30px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-6-d60a4786e4dd9753457b2bae9e004829 av_one_half  avia-builder-el-57  el_after_av_textblock  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8vdykex-7e437e33dfb869539f51d61984050835\">\n#top .avia-icon-list-container.av-l8vdykex-7e437e33dfb869539f51d61984050835 .iconlist_icon{\nbackground-color:#702423;\n}\n.avia-icon-list-container.av-l8vdykex-7e437e33dfb869539f51d61984050835 .iconlist_content{\ncolor:#101010;\n}\n<\/style>\n<div  class='avia-icon-list-container av-l8vdykex-7e437e33dfb869539f51d61984050835  avia-builder-el-58  el_before_av_textblock  avia-builder-el-first '><ul class='avia-icon-list avia_animate_when_almost_visible avia-icon-list-left av-iconlist-big av-l8vdykex-7e437e33dfb869539f51d61984050835 avia-iconlist-animate'>\n<li><div class='iconlist_icon av-sb722-8988f9ec158af14b15338ac25b834fde 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>High linearity (low THD)<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-m8262-85f1f33d42a30491ad4fb43aed107e52 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>Low resonance frequency<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-dke9e-37ecd765687213e598a35ea0deff7c1c 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>High VAS<\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article><div class=\"iconlist-timeline\"><\/div><\/li>\n<li><div class='iconlist_icon av-ap67m-c997adabf005cf3339367bf958e62acc 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>High sensitivity (to keep battery drain low)<\/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-2-67de9f782e9d3622217b470045761153 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>The OWR-1653T-20 driver is an excellent driver with good compromise between size and performance that will work well in applications such as smart glasses.<\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8vec1zq-4-e06b7fe58639dae2f401d071ee4fab2b\">\n#top .hr.hr-invisible.av-l8vec1zq-4-e06b7fe58639dae2f401d071ee4fab2b{\nheight:30px;\n}\n<\/style>\n<div  class='hr av-l8vec1zq-4-e06b7fe58639dae2f401d071ee4fab2b hr-invisible  avia-builder-el-60  el_after_av_textblock  el_before_av_button '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<div  class='avia-button-wrap av-lgp02b5z-3-639e492d2a1044e88a4a26c1c62f1579-wrap avia-button-center  avia-builder-el-61  el_after_av_hr  avia-builder-el-last  button-front-2'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lgp02b5z-3-639e492d2a1044e88a4a26c1c62f1579\">\n#top #wrap_all .avia-button.av-lgp02b5z-3-639e492d2a1044e88a4a26c1c62f1579{\ncolor:#bf4542;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-3-639e492d2a1044e88a4a26c1c62f1579:hover{\nbackground-color:#f9f9f9;\ncolor:#ffffff;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-3-639e492d2a1044e88a4a26c1c62f1579 .avia-svg-icon svg:first-child{\nfill:#bf4542;\nstroke:#bf4542;\n}\n#top #wrap_all .avia-button.av-lgp02b5z-3-639e492d2a1044e88a4a26c1c62f1579:hover .avia-svg-icon svg:first-child{\nfill:#ffffff;\nstroke:#ffffff;\n}\n<\/style>\n<a href='https:\/\/products.owolff.com\/page315.aspx?recordid315=2083'  class='avia-button av-lgp02b5z-3-639e492d2a1044e88a4a26c1c62f1579 av-link-btn avia-icon_select-yes-right-icon avia-size-large avia-position-center avia-color-light'  target=\"_blank\"  rel=\"noopener noreferrer\"  aria-label=\"Read more about the OWR-1653T-20 driver\"><span class='avia_iconbox_title' >Read more about the OWR-1653T-20 driver<\/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<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-fszce-1-41252e449c9f0ac6898dedb332ee5739\">\n#top .flex_column.av-fszce-1-41252e449c9f0ac6898dedb332ee5739{\nmargin-top:30px;\nmargin-bottom:0px;\n}\n.flex_column.av-fszce-1-41252e449c9f0ac6898dedb332ee5739{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-fszce-1-41252e449c9f0ac6898dedb332ee5739{\nmargin-top:30px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-fszce-1-41252e449c9f0ac6898dedb332ee5739 av_one_half  avia-builder-el-62  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-l833dvw1-7-4e7fb61b2fe11258fe6c77e8cad064a8\">\n.avia-image-container.av-l833dvw1-7-4e7fb61b2fe11258fe6c77e8cad064a8 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-l833dvw1-7-4e7fb61b2fe11258fe6c77e8cad064a8 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-l833dvw1-7-4e7fb61b2fe11258fe6c77e8cad064a8 av-styling- avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-63  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-616 avia-img-lazy-loading-not-616 avia_image ' src=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Smart-glasses-driver-300x300.jpg\" alt='OWR-1653T-20 driver' title='OWR-1653T-20 driver'  height=\"300\" width=\"300\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Smart-glasses-driver-300x300.jpg 300w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Smart-glasses-driver-80x80.jpg 80w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Smart-glasses-driver-768x768.jpg 768w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Smart-glasses-driver-36x36.jpg 36w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Smart-glasses-driver-180x180.jpg 180w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Smart-glasses-driver-705x705.jpg 705w, https:\/\/owolff.com\/wp-content\/uploads\/2022\/10\/Smart-glasses-driver.jpg 1000w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><\/div><\/div><\/div><\/div><\/div><\/div><!-- close content main div --><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-4e37a-0099f3f5d16cd070cfbae45e2fd4e7a2\">\n.avia-section.av-4e37a-0099f3f5d16cd070cfbae45e2fd4e7a2{\nbackground-color:#ffffff;\nbackground-image:unset;\n}\n<\/style>\n<div id='av_section_8'  class='avia-section av-4e37a-0099f3f5d16cd070cfbae45e2fd4e7a2 main_color avia-section-default avia-no-border-styling  avia-builder-el-64  el_after_av_section  avia-builder-el-last  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-610'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-8kqo2-91cb5c8e7850e66def72c94ec1cf320c\">\n#top .av-special-heading.av-8kqo2-91cb5c8e7850e66def72c94ec1cf320c{\nmargin:80px 0 0 0;\npadding-bottom:20px;\ncolor:#101010;\nfont-size:30px;\n}\nbody .av-special-heading.av-8kqo2-91cb5c8e7850e66def72c94ec1cf320c .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-8kqo2-91cb5c8e7850e66def72c94ec1cf320c .av-special-heading-tag{\nfont-size:30px;\n}\n.av-special-heading.av-8kqo2-91cb5c8e7850e66def72c94ec1cf320c .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-8kqo2-91cb5c8e7850e66def72c94ec1cf320c .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and 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