{"id":10992,"date":"2026-05-12T11:33:46","date_gmt":"2026-05-12T09:33:46","guid":{"rendered":"https:\/\/owolff.com\/?p=10992"},"modified":"2026-05-12T11:36:21","modified_gmt":"2026-05-12T09:36:21","slug":"the-challenge-of-inappropriate-hf-response-in-headphone-drivers","status":"publish","type":"post","link":"https:\/\/owolff.com\/en\/white-papers\/the-challenge-of-inappropriate-hf-response-in-headphone-drivers\/","title":{"rendered":"The challenge of inappropriate HF response in Headphone drivers"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mp2btpey-04414ed15ff54dd54bf04a939cf21335\">\n.avia-section.av-mp2btpey-04414ed15ff54dd54bf04a939cf21335{\nbackground-color:#f9f9f9;\nbackground-image:unset;\n}\n<\/style>\n<div id='av_section_1'  class='avia-section av-mp2btpey-04414ed15ff54dd54bf04a939cf21335 main_color avia-section-default avia-no-border-styling  avia-builder-el-0  el_before_av_section  avia-builder-el-first  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.av-post-metadata-container.av-mp15jdsb-60bf2ccf5081e231d87d26245e720c3a{\ncolor:#adadad;\nmargin:0 0 10px 0;\n}\n<\/style>\n<div  class='av-post-metadata-container av-mp15jdsb-60bf2ccf5081e231d87d26245e720c3a av-metadata-container-align-left  avia-builder-el-10  el_before_av_heading  avia-builder-el-first  av-metadata-container-1'><div class='av-post-metadata-container-inner'><span class=\"av-post-metadata-content av-post-metadata-meta-content\"><span class=\"av-post-metadata-content av-post-metadata-modified\"><span class=\"av-post-metadata-modified-date\" >May 12, 2026<\/span><\/span><span class=\"av-post-metadata-content av-post-metadata-separator\">\/<\/span><span class=\"av-post-metadata-content av-post-metadata-category\"><span class=\"av-post-metadata-category-name\" >Acoustics news<\/span>, <span class=\"av-post-metadata-category-name\" >White papers<\/span><\/span><\/span><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-2pfino-3bb69ff6d06c75c2735dd787ed44fff3\">\n#top .av-special-heading.av-2pfino-3bb69ff6d06c75c2735dd787ed44fff3{\nmargin:0 0 20px 0;\npadding-bottom:0;\ncolor:#101010;\n}\nbody .av-special-heading.av-2pfino-3bb69ff6d06c75c2735dd787ed44fff3 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-2pfino-3bb69ff6d06c75c2735dd787ed44fff3 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-2pfino-3bb69ff6d06c75c2735dd787ed44fff3 .av-subheading{\nfont-size:21px;\n}\n<\/style>\n<div  class='av-special-heading av-2pfino-3bb69ff6d06c75c2735dd787ed44fff3 av-special-heading-h1 custom-color-heading blockquote modern-quote  avia-builder-el-11  el_after_av_post_metadata  el_before_av_textblock '><h1 class='av-special-heading-tag '  itemprop=\"headline\"  >The challenge of inappropriate HF response in Headphone drivers<\/h1><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-lc0kj8mr-00ef363c0707f6cf213f97054e43b482\">\n#top .av_textblock_section.av-lc0kj8mr-00ef363c0707f6cf213f97054e43b482 .avia_textblock{\ncolor:#101010;\n}\n<\/style>\n<section  class='av_textblock_section av-lc0kj8mr-00ef363c0707f6cf213f97054e43b482 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><p><strong>Getting HF Response Right in Headphone Drivers<\/strong><\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal leading-&#091;1.7&#093;\">High-frequency response above 8 kHz is critical to sound clarity and stereo imaging in headphones, yet most drivers struggle to reproduce it cleanly. Our latest white paper examines why peaks and valleys appear in this frequency range and what it takes to eliminate them.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal leading-&#091;1.7&#093;\">The paper identifies two root causes: breakup modes in the driver diaphragm itself, where sections move out of phase at higher frequencies, and reflections from the headphone housing and outer ear geometry. While the latter is difficult to control, diaphragm-induced resonances can be addressed through material choice and geometry &#8211; specifically, by using stiff composite materials optimized with finite element tools such as COMSOL.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal leading-&#091;1.7&#093;\">To demonstrate what is achievable, we present a frequency response measurements of our \u00d840mm carbon composite headphone driver. Measured both in free field and via a 711 coupler, the driver shows deviations no greater than approximately 3 dB above 8 kHz, with very low Q-factor resonances &#8211; translating to natural, coloration-free sound reproduction with preserved stereo directivity.<\/p>\n<hr \/>\n<\/div><\/section><br \/>\n<div  class='avia-button-wrap av-mp16ogig-4c5782c79cb6488b071e74d96f9cacd9-wrap avia-button-left  avia-builder-el-13  el_after_av_textblock  avia-builder-el-last '>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mp16ogig-4c5782c79cb6488b071e74d96f9cacd9\">\n#top #wrap_all .avia-button.av-mp16ogig-4c5782c79cb6488b071e74d96f9cacd9{\nfont-size:15px;\ncolor:#bf4542;\nborder-style:none;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-mp16ogig-4c5782c79cb6488b071e74d96f9cacd9:hover{\ncolor:#702423;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-mp16ogig-4c5782c79cb6488b071e74d96f9cacd9 .avia-svg-icon svg:first-child{\nfill:#bf4542;\nstroke:#bf4542;\n}\n#top #wrap_all .avia-button.av-mp16ogig-4c5782c79cb6488b071e74d96f9cacd9:hover .avia-svg-icon svg:first-child{\nfill:#702423;\nstroke:#702423;\n}\n<\/style>\n<a href='https:\/\/owolff.com\/wp-content\/uploads\/2026\/05\/WP15-inappropriate-hf-response-in-headphone-drivers.pdf'  class='avia-button av-mp16ogig-4c5782c79cb6488b071e74d96f9cacd9 av-link-btn avia-icon_select-no avia-size-small avia-position-left'  target=\"_blank\"  rel=\"noopener noreferrer\"  aria-label=\"READ THE WHITE PAPER \u2192\"><span class='avia_iconbox_title' >READ THE WHITE PAPER \u2192<\/span><\/a><\/div><\/p><\/div>\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='after_section_2'  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-10992'><div class='entry-content-wrapper clearfix'>\n<div  class='avia-builder-widget-area clearfix  avia-builder-el-14  el_after_av_section  el_before_av_section  avia-builder-el-no-sibling '>      <section id=\"mailpoet_form-2\" class=\"widget clearfix widget_mailpoet_form\">\n  \n  \n  <div class=\"\n    mailpoet_form_popup_overlay\n      \"><\/div>\n  <div\n    id=\"mailpoet_form_1\"\n    class=\"\n      mailpoet_form\n      mailpoet_form_widget\n      mailpoet_form_position_\n      mailpoet_form_animation_\n    \"\n      >\n\n    <style type=\"text\/css\">\n     #mailpoet_form_1 form.mailpoet_form { margin-bottom: 0; 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https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-600x600.jpg 600w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-100x100.jpg 100w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/><\/a><div class=\"slide-content\"><header class=\"entry-content-header\" aria-label=\"Slide: Acoustic design of True Wireless earphones (TWS) using COMSOL Multiphysics\"><\/header><\/div><footer class=\"entry-footer\"><\/footer><span class='hidden'>\n\t\t\t\t<span class='av-structured-data'  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" >\n\t\t\t\t\t\t<span itemprop='url'>https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-scaled.jpg<\/span>\n\t\t\t\t\t\t<span itemprop='height'>2560<\/span>\n\t\t\t\t\t\t<span itemprop='width'>2560<\/span>\n\t\t\t\t<\/span>\n\t\t\t\t<span class='av-structured-data'  itemprop=\"publisher\" itemtype=\"https:\/\/schema.org\/Organization\" itemscope=\"itemscope\" >\n\t\t\t\t\t\t<span 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Multiphysics<\/span><\/span><\/span><\/article><article class='slide-entry flex_column  post-entry post-entry-10632 slide-entry-overview slide-loop-3 slide-parity-odd  post-entry-last  av_one_third  real-thumbnail posttype-post post-format-standard'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><a href='https:\/\/owolff.com\/en\/white-papers\/advanced-voice-coil-and-wire-technology-for-micro-speakers-and-drivers\/' data-rel='slide-1' class='slide-image' title='Advanced voice coil and wire technology for micro speakers and drivers'><img decoding=\"async\" fetchpriority=\"high\" width=\"1080\" height=\"1080\" src=\"https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin.jpg\" class=\"wp-image-10710 avia-img-lazy-loading-not-10710 attachment-no scaling size-no scaling wp-post-image\" alt=\"\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin.jpg 1080w, 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