Carlille S, Pralong D
University Laboratory of Physiology, Oxford, United Kingdom.
J Acoust Soc Am. 1994 Jun;95(6):3445-59. doi: 10.1121/1.409965.
The human head-related transfer function (HRTF) has been recorded binaurally from eight subjects using an "in-ear" recording system, for 343 stimulus locations around the head. There are a number of systematic changes in the HRTF as a function of horizontal location and elevation, on and off the median plane, that could be used as cues to sound location. To identify which components of the HRTF might provide perceptually salient cues to sound location, the HRTFs were transformed using an auditory filter model which accounts for the frequency dependence of auditory sensitivity and the frequency and level-dependent characteristics of the auditory filters. These transformations indicated a systematic variation in the frequency of the peak excitation as a function of the horizontal location of a broad band stimulus. Furthermore, there were differences in the frequency range over which elevation-dependent changes in the excitation patterns varied as a function of the vertical meridian. Interaural level differences were also estimated using the excitation patterns. The across frequency pattern of ILDs were roughly symmetrical about the interaural axis, although there were substantial differences between each ear in the magnitude of the ILDs generated for ipsilateral sounds locations.
已使用“入耳式”录音系统从八名受试者双耳记录了人头相关传递函数（HRTF），针对头部周围343个刺激位置。HRTF存在许多作为水平位置和仰角函数的系统性变化，在中值平面上和中值平面外，这些变化可作为声音定位的线索。为了确定HRTF的哪些成分可能为声音定位提供感知上显著的线索，使用了一种听觉滤波器模型对HRTF进行变换，该模型考虑了听觉敏感度的频率依赖性以及听觉滤波器的频率和电平依赖性特征。这些变换表明，作为宽带刺激水平位置的函数，峰值兴奋频率存在系统性变化。此外，兴奋模式中仰角相关变化随垂直子午线变化的频率范围也存在差异。还使用兴奋模式估计了耳间水平差异。ILDs的跨频率模式大致关于耳间轴对称，尽管在为同侧声音位置生成的ILDs大小方面，每只耳朵之间存在显著差异。
