{"id":3987,"date":"2026-05-18T14:00:11","date_gmt":"2026-05-18T12:00:11","guid":{"rendered":"https:\/\/blog.rwth-aachen.de\/akustik\/?post_type=tribe_events&#038;p=3987"},"modified":"2026-05-18T14:04:08","modified_gmt":"2026-05-18T12:04:08","slug":"aks-arora-modelling-the-optoacoustic-stimulation-of-the-eardrum","status":"publish","type":"tribe_events","link":"https:\/\/blog.rwth-aachen.de\/akustik\/event\/aks-arora-modelling-the-optoacoustic-stimulation-of-the-eardrum\/","title":{"rendered":"Aks Arora: Modelling the optoacoustic stimulation of the eardrum"},"content":{"rendered":"<div role=\"listitem\">\n<div class=\"\">\n<div id=\"post_9u3mfyxubjd6tb7eidjrb61eiy\" class=\"a11y__section post same--root same--user\" tabindex=\"0\" aria-label=\"At 12:39 PM Wednesday, May 13, aks.arora wrote, hier der titek : Modelling the optoacoustic stimulation of the eardrum\" data-testid=\"postView\">\n<div class=\"post__content \" role=\"application\" data-testid=\"postContent\">\n<div>\n<div id=\"9u3mfyxubjd6tb7eidjrb61eiy_message\" class=\"post__body\">\n<div class=\"AutoHeight\">\n<div>\n<div class=\"post-message post-message--collapsed\">\n<div class=\"post-message__text-container\">\n<div id=\"postMessageText_9u3mfyxubjd6tb7eidjrb61eiy\" class=\"post-message__text\" dir=\"auto\" tabindex=\"0\">\n<div>\n<div class=\"post-message post-message--collapsed\">\n<div class=\"post-message__text-container\">\n<div id=\"postMessageText_gb6rktdoo3dsmkw7dpia15q3fh\" class=\"post-message__text\" dir=\"auto\" tabindex=\"0\">\n<p>Optoacoustic stimulation is an umbrella term describing the generation of mechanical vibrations through optical irradiation and has recently attracted attention as a potential principle for light-driven hearing-aid systems. One specific mechanism underlying this effect is thermoelastic bending, referred to in this work as thermoelastic excitation. While previous studies have mainly investigated simplified artificial membrane models or classical acoustic excitation of anatomical middle ears, thermoelastic stimulation in anatomically realistic middle ear structures has not yet been studied. In this thesis, an anatomical finite element model of the human middle ear is extended by a small disc placed on the tympanic membrane (TM) and heated by a temperature gradient corresponding to a short single laser pulse. This temperature gradient within the disc induces thermoelastic bending, which excites vibrations of the TM. The results show that the excitation is transmitted to the stapes footplate, although displacement amplitudes are smaller than in simplified configurations. The predicted sound pressure levels (SPL) reflect sufficient stimulation in low frequencies, but show poor response in the high frequency range between 1-4 kHz, showing potential hearing aid plausibility but only with future optimization.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div role=\"listitem\">\n<div class=\"\">\n<div id=\"post_gb6rktdoo3dsmkw7dpia15q3fh\" class=\"a11y__section post same--root same--user\" tabindex=\"0\" aria-label=\"At 12:40 PM Wednesday, May 13, aks.arora wrote, abstract : Optoacoustic stimulation is an umbrella term describing the generation of mechanical vibrations through optical irradiation and has recently attracted attention as a potential principle for light-driven hearing-aid systems. One specific mechanism underlying this effect is thermoelas- tic bending, referred to in this work as thermoelastic excitation. While previous studies have mainly investigated simplified artificial membrane models or classical acoustic excitation of anatomical middle ears, ther- moelastic stimulation in anatomically realistic middle ear structures has not yet been studied. In this thesis, an anatomical finite element model of the human middle ear is extended by a small disc placed on the tympanic membrane (TM) and heated by a temperature gradient corre- sponding to a short single laser pulse. This temperature gradient within the disc induces thermoelastic bending, which excites vibrations of the TM. The results show that the excitation is transmitted to the stapes footplate, although displacement amplitudes are smaller than in sim- plified configurations. The predicted sound pressure level (SPL) levels reflect sufficient stimulation in low frequencies, but show poor response in the high frequency range between 1-4 kHz, showing potential hearing aid plausibility but only with future optimization\" data-testid=\"postView\">\n<div class=\"post__content \" role=\"application\" data-testid=\"postContent\">\n<div>\n<div id=\"gb6rktdoo3dsmkw7dpia15q3fh_message\" class=\"post__body\">\n<div class=\"post__body-reactions-acks\">\n<div role=\"listitem\">\n<div class=\"\">\n<div id=\"post_7m4j34pxpir178uis1fjpmni6w\" class=\"a11y__section post same--root same--user\" tabindex=\"0\" aria-label=\"At 12:39 PM Wednesday, May 13, aks.arora wrote, deutsche version : Modellierung der optoakustischen Anregung des Trommelfells\" data-testid=\"postView\">\n<div class=\"post__content \" role=\"application\" data-testid=\"postContent\">\n<div>\n<div id=\"7m4j34pxpir178uis1fjpmni6w_message\" class=\"post__body\">\n<div class=\"AutoHeight\">\n<div>\n<div class=\"post-message post-message--collapsed\">\n<div class=\"post-message__text-container\">\n<div id=\"postMessageText_7m4j34pxpir178uis1fjpmni6w\" class=\"post-message__text\" dir=\"auto\" tabindex=\"0\">\n<p><em>DE: Modellierung der optoakustischen Anregung des Trommelfells<\/em><\/p>\n<p><em>Die optoakustische Stimulation ist ein Oberbegriff, der die Erzeugung mechanischer Schwingungen durch optische Bestrahlung beschreibt und in letzter Zeit als m\u00f6gliches Prinzip f\u00fcr lichtgetriebene H\u00f6rsysteme Aufmerksamkeit erregt hat. Ein spezifischer Mechanismus, der diesem Effekt zugrunde liegt, ist die thermoelastische Biegung, die in dieser Arbeit als thermoelastische Anregung bezeichnet wird. W\u00e4hrend sich fr\u00fchere Studien haupts\u00e4chlich mit vereinfachten k\u00fcnstlichen Membranmodellen oder mit der klassischen akustischen Anregung anatomischer Mittelohrmodelle besch\u00e4ftigt haben, wurde die thermoelastische Stimulation in anatomisch realistischen Mittelohrstrukturen bislang nicht untersucht. In dieser Arbeit wird ein anatomisches Finite-Elemente-Modell des menschlichen Mittelohres um eine kleine Scheibe erweitert, die auf dem Trommelfell platziert ist und durch einen Temperaturgradienten infolge eines kurzen einzelnen Laserpulses erhitzt wird. Dieser Temperaturgradient innerhalb der Scheibe f\u00fchrt zu einer thermoelastischen Biegung, die Schwingungen des Trommelfells anregt. Die Ergebnisse zeigen, dass die Anregung bis zur Steigb\u00fcgelfu\u00dfplatte \u00fcbertragen wird, obwohl die Verschiebungsamplituden kleiner sind als in vereinfachten Konfigurationen. Die vorhergesagten Schalldruckpegel liegen im niedrigen Frequenzbereich im wahrnehmbaren H\u00f6rbereich, zeigen jedoch im Bereich von 1\u20134 kHz eine deutlich reduzierte Auspr\u00e4gung, sodass eine Anwendung als H\u00f6rhilfe nur bei weiterer Optimierung realistisch erscheint. Der Vortrag wird auf Englisch gehalten.<\/em><\/p>\n<p><a href=\"https:\/\/lists.rwth-aachen.de\/postorius\/lists\/akustik-kolloquium.lists.rwth-aachen.de\">Melden Sie sich hier an um Einladungen zu den Kolloquium-Vortr\u00e4gen per E-Mail zu erhalten.<\/a><br \/>\n<a href=\"https:\/\/lists.rwth-aachen.de\/postorius\/lists\/akustik-kolloquium.lists.rwth-aachen.de\">Register here to receive the invitations to colloquium talks via e-mail.<\/a><\/p>\n<p>Zoom-Meeting-ID: <a href=\"https:\/\/rwth.zoom-x.de\/j\/64373848607?pwd=BlgF1uzbmHahX9FQReqaiPqwYi3Fam.1\" target=\"_blank\" rel=\"noopener\">643 7384 8607<\/a><br \/>\nPasswort: 2020000<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Optoacoustic stimulation is an umbrella term describing the generation of mechanical vibrations through optical irradiation and has recently attracted attention as a potential principle for light-driven hearing-aid systems. One specific [&hellip;]<\/p>\n","protected":false},"author":3556,"featured_media":0,"template":"","meta":{"_tribe_events_status":"","_tribe_events_status_reason":"","footnotes":""},"tags":[],"tribe_events_cat":[75],"class_list":["post-3987","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-verteidigung-bachelorarbeit","cat_verteidigung-bachelorarbeit"],"_links":{"self":[{"href":"https:\/\/blog.rwth-aachen.de\/akustik\/wp-json\/wp\/v2\/tribe_events\/3987","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.rwth-aachen.de\/akustik\/wp-json\/wp\/v2\/tribe_events"}],"about":[{"href":"https:\/\/blog.rwth-aachen.de\/akustik\/wp-json\/wp\/v2\/types\/tribe_events"}],"author":[{"embeddable":true,"href":"https:\/\/blog.rwth-aachen.de\/akustik\/wp-json\/wp\/v2\/users\/3556"}],"version-history":[{"count":3,"href":"https:\/\/blog.rwth-aachen.de\/akustik\/wp-json\/wp\/v2\/tribe_events\/3987\/revisions"}],"predecessor-version":[{"id":3992,"href":"https:\/\/blog.rwth-aachen.de\/akustik\/wp-json\/wp\/v2\/tribe_events\/3987\/revisions\/3992"}],"wp:attachment":[{"href":"https:\/\/blog.rwth-aachen.de\/akustik\/wp-json\/wp\/v2\/media?parent=3987"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.rwth-aachen.de\/akustik\/wp-json\/wp\/v2\/tags?post=3987"},{"taxonomy":"tribe_events_cat","embeddable":true,"href":"https:\/\/blog.rwth-aachen.de\/akustik\/wp-json\/wp\/v2\/tribe_events_cat?post=3987"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}