DIRECTIONAL DEPENDENCE OF INTERAURAL ENVELOPE DELAYS
DIRECTIONAL DEPENDENCE OF INTERAURAL ENVELOPE DELAYS
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DOI：
10.1121/1.399183
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发表时间：
1990-05-01
影响因子：
2.4
通讯作者：
GREEN, DM
中科院分区：
文献类型：
--
作者：
MIDDLEBROOKS, JC;GREEN, DM
在6名受试者中测量了耳间包络延迟，作为可移动声源位置的函数，频带通过3到16 kHz。共有324个震源位置以10度的水平和垂直增量进行了测试。描述了一种与记录麦克风在耳道中的位置无关地估计外耳的复方向传递函数的方法。为了计算耳间包络延迟，将左耳和右耳的方向传递函数与临界带滤波卷积，计算包络，并对包络进行互相关。耳间包络延迟和耳间群延时随临界频带滤光器的中心频率和声源的垂直位置而略有不同。然而，对于第一个近似值，在耳道中测量的包络延迟随着相对于正中平面的入射角的增加而单调增加，就像刚性球体表面上的两个麦克风一样。讨论了耳间包络延迟对声音局部化行为的可能贡献。
Interaural envelope delays were measured in six human subjects as a function of the locations of a movable sound source, bandpassed between 3 and 16 kHz. A total of 324 source locations were tested in horizontal and vertical increments of 10.degree.. A method is described for estimating the complex directional transfer function of the external ear, independent of the position of the recording microphone in the ear canal. To compute interaural envelope delays, directional transfer functions from the left and right ears were convolved with a critical-band filter,the envelopes were computed, and the envelopes were cross correlated. Interaural envelope delays, as well as interaural group delays, varied somewhat with the center frequency of the critical-band filter and with the vertical location of the sound source. Nevertheless, to a first approximation, envelope delays, measured in the ear canals increased monotonically with increasing angle of incidence relative to the median plane, as they would for two microphones on the surface of a rigid sphere. The results are discussed in relation to the possible contribution of interaural envelope delays to sound localization behavior.