中耳传输响应对声源定位的影响

以MIT媒体实验室测得的HRTF实验数据为基础,在不同的声源信号激励下,双耳信号分包括中耳传输响应和不包括中耳传输响应两种情况,通过计算耳间互相关函数,分别得到IACC、双耳时间差和耳间互相关函数的宽度WIACC等三个声学参数,探讨了中耳传输响应对声源定位的影响.结果表明,中耳传输响应基本不影响声源方位角的定位,但会对声源的明晰度产生影响,而对声源明晰度影响的大小在一定程度上取决于声源信号的频谱.

Middle Ear Transfer Response's Effect on Sound Source Localization

Based on the HRTF database of MIT media lab, in terms of different sound sources, two situations of binaural signal including and not including middle ear transfer response are considered. Parameters such as IACC, binaural time difference and WIACC are derived by computing interaural crosscorrelation function. The effect of middle ear transfer response on sound source localization is then discussed in this paper. It is indicated through the results that middle ear transfer response doesn＇t affect the direction angle localization of sound source, but can affect the clearness of sound source, and to some degree, this affection is decided by frequency spectrum of sound source signal.