Modeling and estimating acoustic transfer functions of external ears with or without headphones.
Modeling and estimating acoustic transfer functions of external ears with or without headphones.
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DOI：
10.1121/1.4926560
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发表时间：
2015-08
期刊：
影响因子：
--
通讯作者：
Huiqun Deng;Jun Yang
中科院分区：
文献类型：
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作者：
Huiqun Deng;Jun Yang
带或不带耳机的外耳的声学传递函数影响所感知的声音的特征，并且随着收听者和耳机而变化很大。基于外耳声信号模型，提出了一种针对不同听者和不同耳机的外耳传递函数的频率响应估计方法，该方法可以估计从阻塞耳道入口处的声音（或从耳机的输入）到鼓膜处的声音的外耳传递函数的频率响应。该模型允许应用关于个人外耳和耳机的真实数据，并且优于具有限于模拟低于10 kHz的平均耳道和鼓膜阻抗的固定结构的当前标准耳模拟器。给定不同的鼓膜阻抗，耳道形状，长度和耳机，外耳传递函数的频率响应的估计和提出。此外，还提出了一种由声管内声压信号确定耳机的诺顿等效体速或戴维南等效声压源的方法。这些方法通过直接测量进行验证，并有望在耳机声音再现、耳机和助听器设计以及听力和心理声学测量中应用，以在不同听众的耳膜处产生所需的声音。
The acoustic transfer functions of external ears with or without headphones affect the features of perceived sounds and vary considerably with listeners and headphones. A method for estimating the frequency responses of external-ear transfer functions from the sound at the entrance of a blocked ear canal (or from the input of a headphone) to the sound at the eardrum for different listeners and headphones is developed based on an acoustic signal model of external ears. The model allows for applying realistic data about individual external ears and headphones and is advantageous over current standard ear simulators with fixed structures limited to simulating average ear canals and eardrum impedances below 10 kHz. Given different eardrum impedances, ear canal shapes, lengths, and headphones, the frequency responses of external-ear transfer functions are estimated and presented. In addition, a method of determining the Norton equivalent volume velocity or Thevenien equivalent sound pressure sources of a headphone from sound pressure signals in an acoustic tube is presented. These methods are validated via direct measurements and expected to have applications in headphone sound reproduction, headphone and hearing aid design, and audiometric and psychoacoustic measurements to produce desired sounds at the eardrums of different listeners.