Analysis of the Mechanical Properties of the Human Tympanic Membrane and Its Influence on the Dynamic Behaviour of the Human Hearing System

Applied Bionics and Biomechanics
L CaminosA Gonzalez-Herrera

Abstract

The difficulty to estimate the mechanical properties of the tympanic membrane (TM) is a limitation to understand the sound transmission mechanism. In this paper, based on finite element calculations, the sensitivity of the human hearing system to these properties is evaluated. The parameters that define the bending stiffness properties of the membrane have been studied, specifically two key parameters: Young's modulus of the tympanic membrane and the thickness of the eardrum. Additionally, it has been completed with the evaluation of the presence of an initial prestrain inside the TM. Modal analysis is used to study the qualitative characteristics of the TM comparing with vibration patterns obtained by holography. Higher-order modes are shown as a tool to identify these properties. The results show that different combinations of elastic properties and prestrain provide similar responses. The presence of prestrain at the membrane adds more uncertainty, and it is pointed out as a source for the lack of agreement of some previous TM elastic modulus estimations.

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Citations

Nov 10, 2020·Tissue Engineering. Part B, Reviews·Mina AleemardaniAlexander Seifalian
Feb 17, 2021·Journal of the Association for Research in Otolaryngology : JARO·Xiaohui LinWei Dong
May 11, 2020·Micron : the International Research and Review Journal for Microscopy·Jordi Marcé-Nogué, Juan Liu
Sep 28, 2021·European Archives of Oto-rhino-laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery·Nicholas BevisDirk Beutner

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