在金奇拉外耳进行骨传导声音的测量
Peter Bowers1, Michael E Ravicz2, John J Rosowski3
1Speech and Hearing Bioscience and Technology Program, Harvard Graduate School of Arts and Sciences, Cambridge MA, United States.
Hearing research
|December 14, 2023
概括
骨传导 (BC) 刺激内耳,部分是通过由骨性耳道壁振动产生的声音压力. 堵塞耳道显著增加这些压力,增强BC听力.
科学领域:
- 听觉神经科学 听觉神经科学
- 生物声学是一种生物声学.
- 耳鼻科 耳鼻科 耳鼻科 耳鼻科
背景情况:
- 骨传导 (BC) 听力对于理解听觉功能至关重要,特别是在传导性听力损失的情况下.
- 通过BC刺激在耳道内产生声压并刺激内耳的精确机制仍然不完全理解.
- 以前的研究集中在头骨振动传输上,但耳道声学特性的作用不太清楚.
研究的目的:
- 为了研究在辛奇拉的BC诱导的耳道声压的产生.
- 确定这些压力对内耳的整体BC反应的贡献.
- 阐明耳道壁,骨和大运动在BC声传输中的作用.
主要方法:
- 测量了头骨速度,耳膜声压 (PTM) 和内耳复合动力潜力 (CAP) 在青耳中进行.
- 实验涉及操纵耳道 (闭塞),骨和大,以隔离每个组件的贡献.
- 分析了这些操纵对BC诱导的声压和神经反应的频率依赖效应.
主要成果:
- 骨性耳道壁的振动对BC诱导的耳道声压有很大影响,尤其是低于2kHz的声压.
- 在骨软骨边界的耳道封闭增加了PTM约10dB在低频率.
- 反向中耳传输 (骨,TM) 和耳通道相对运动对PTM做出了最小的贡献.
- 发现BC诱导的耳道声压在耳道被堵塞时显著促进内耳刺激,CAP值变化证明了这一点.
结论:
- 骨式耳道壁振动是奇拉耳道中BC诱导的声音压力的重要产生者.
- 这种BC引起的声压在刺激内耳方面起着重要的作用,特别是当耳道被堵塞时.
- 了解这些机制对于开发改进的BC助听器技术和诊断听力障碍至关重要.
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