含主动耳蜗的人耳传声有限元模拟

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (21) : 41-45.

论文

含主动耳蜗的人耳传声有限元模拟

王学林, 周健军, 凌玲, 胡于进

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FEM simulation of sound transmission in human ear with active cochlear model

WANG Xue-lin, ZHOU Jian-jun, LING Ling, HU Yu-jin

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文章历史 +

摘要

采用外耳道、中耳、简化耳蜗耦合的有限元模型，模拟声压从外耳道传入耳蜗和耳蜗液体驱动基底膜振动的过程。耳蜗模型包含正交各向异性材料基底膜并考虑尺寸和材料性质沿长度的变化，在对柯蒂氏器进行微观力学分析的基础上，运用前馈模型实现耳蜗的主动机制。提出了外耳道声音激励与耳蜗主动机制联合作用下中耳和耳蜗响应计算方法，结果表明提出的模型实现了外耳道激励下基底膜位移与激励水平的非线性、基底膜频率选择特性等模拟。

Abstract

A finite element model integrating the ear canal, middle ear and cochlea is established and applied to simulate the process of the sound transmission from ear canal to the cochlea, and the cochlear fluid driving the basilar membrane to vibrate. The cochlear model includes an orthotropic basilar membrane with dimensional material property variation along its length. Based on the micro-mechanics analysis of the organ of Corti, a feed-forward mechanism is used to accomplish the cochlear active amplifier features. A numerical method, combining ear canal stimuli and cochlea active mechanism, is developed to compute the responses in the middle ear and active cochlea. The present results show that the model achieved basilar membrane response level compression and frequency selectivity characteristics with respect to ear canal sound stimuli.

导出引用

王学林;周健军;凌玲;胡于进 . 含主动耳蜗的人耳传声有限元模拟[J]. 振动与冲击, 2012, 31(21): 41-45

WANG Xue-lin;ZHOU Jian-jun;LING Ling;HU Yu-jin. FEM simulation of sound transmission in human ear with active cochlear model[J]. Journal of Vibration and Shock, 2012, 31(21): 41-45