头相关听觉定位隐性线索的仿真分析

Simulation Analysis of Unrevealed Head-Related Auditory Localization Clues

通过有限元仿真,计算当声源位于水平面、中垂面和侧垂面时声学头模耳道入口处的声压分布模态,并从声压分布走势以及声压范围两个方面对比前后、上下镜像方向之间声压分布模态的差异,得到可能被利用进行听觉定位的隐性线索特征频段,其中正前方与正后方的特征频段与主观听感实验结果基本一致。

The pressure distribution at the ear canal entrance of the dummy head was calculated by finite element method when the sound source was located in the horizontal,median and lateral planes,and differences of the pressure distribution patterns between front-back and up-down mirror sound directions were compared from two aspects of sound pressure distribution trend and sound pressure range,and the probably available characteristic frequency bands of auditory localization unrevealed clues were obtained subsequently.The characteristic frequency bands of front and rear are basically consistent with the results of subjective hearing perception experiment.