Morphology of human ear canal and its effect on sound transmission
Morphology of human ear canal and its effect on sound transmission
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人耳道形态及其对声音传播的影响
DOI：
10.1002/cnm.3567
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发表时间：
2022-01-02
影响因子：
2.1
通讯作者：
Huang，Xinsheng
中科院分区：
文献类型：
--
作者：
Zhou，Lei;Shen，Na;Huang，Xinsheng
耳道（EC）对于声音传输至关重要，对听力至关重要。某些病理条件可能会改变其形态，导致EC声压重新分布，镫骨踏板位移（FPD）增益改变。然而，关于病理性EC及其对声音传递的影响尚未达成共识。研究EC的形态对声压重分布和FPD增益的影响。在有限元分析的基础上，建立了多种病理性食管癌的有限元模型并进行了分析。结果表明，乳突切除术降低了EC的第二共振频率。耳道下乳突切除加耳甲成形术使第一共振频率增加，第二共振频率沿着间隔声压增益的增加而降低，FPD增益随之改变。EC在内部部分处的狭窄降低了第二共振频率，对第一部分的影响最小。当狭窄段向EC外侧移动时，第一共振频率降低，第二共振频率升高，沿着降低间隔声压增益，FPD增益。最后，简化的EC模型施加的声音传递的影响最小。EC的最小变化，如简化，拉直，管壁下乳突切除术，或扩大，中度影响声音传递;然而，EC狭窄显着恶化的声音传递。
The ear canal (EC) is essential for sound transfer and crucial for hearing. Some pathological conditions may modify its morphology, leading to EC sound pressure redistribution, and stapes footplate displacement (FPD) gain alteration. However, no consensus regarding pathological EC and its impact on sound transfer has yet been achieved. To address the effect of morphology of EC on sound pressure redistribution and FPD gain. Varied pathological EC finite element (FE) models were constructed and analyzed based on FE analysis. The results indicated that canal wall down mastoidectomy decreases the second resonance frequency of the EC. The canal wall down mastoidectomy, with conchaplasty increased the first resonance frequency, but decreased the second along with the interval sound pressure gain increased, following which the FPD gain was altered. Stenosis of the EC at the internal portion decreased the second resonance frequency with minimal effect to the first part. When the stenosis moved to the outer portion of the EC, the first resonance frequency decreased, and the second one increased, along with the interval sound pressure gain decreased and FPD gain. Finally, the simplified EC model exerted a minimal effect on sound transfer. The minimal change in EC, such as simplification, straightening, canal wall down mastoidectomy, or enlargement, moderately affects the sound transfer; however, the EC stenosis deteriorates the sound transfer remarkably.