A model of the occlusion effect with bone-conducted stimulation
A model of the occlusion effect with bone-conducted stimulation
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DOI：
10.1080/14992020701545880
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发表时间：
2007-10-01
影响因子：
2.7
通讯作者：
Reinfeldt, Sabine
中科院分区：
文献类型：
--
作者：
Stenfelt, Stefan;Reinfeldt, Sabine
采用简化的耳部解剖设计了一个声学模型来预测人类耳道声压闭塞效应。这些预测在感知上与使用浅插入泡沫耳塞、深插入泡沫耳塞进入耳道骨部分和耳环耳罩的耳道声压闭塞效应测量进行了比较。在模型预测和耳道声压测量之间有很好的相似性。我们还发现，所有的咬合位置，甚至是深耳道咬合，都能产生明显的咬合效果。当骨传导换能器位于前额时，感知到的闭塞效果与0.3 ~ 2 kHz频率范围内耳道声压数据获得的闭塞效果接近；当刺激位于乳突时，在低于1 kHz的频率下，耳道声压闭塞效应的感知与测量差值约为10 dB。此外，在两种临床环境下：使用耳上耳机（TDH39）和插入式耳机（CIR22），获得了闭塞效果。虽然两种换能器都会产生遮挡效果，但在低频时，插入式耳机比耳外耳机产生更大的效果。
An acoustical model using simplified ear anatomy was designed to predict the ear-canal sound pressure occlusion effect in humans. These predictions were compared perceptually as well as with ear-canal sound pressure occlusion effect measurements using a foam earplug with shallow insertion, a foam earplug with deep insertion into the bony part of the ear canal, and a circumaural earmuff. There was good resemblance between model predictions and ear-canal sound pressure measurements. It was also found that all occlusion positions, even deep ear-canal occlusion, produced noticeable occlusion effects. With the bone-conduction transducer at the forehead, the perceived occlusion effect was close to that obtained from ear-canal sound pressure data in the 0.3 to 2 kHz frequency range; when the stimulation was at the mastoid the difference between the perceived and measured ear-canal sound pressure occlusion effect was around 10 dB at frequencies below 1 kHz. Further, the occlusion effect was obtained in two clinical settings: with supra-aural earphones (TDH39), and insert earphones (CIR22). Although both transducers produced occlusion effects, insert earphones produced a greater effect than surpaaural earphones at the low frequencies.