基于耳蜗核模型改进双耳时间差的声源定位  

Sound localization based on improved interaural time difference of cochlear nucleus model

作　　者：张毅[1] 邢武超[1] 罗元[2] 何春江[1] 

机构地区：[1]重庆邮电大学信息无障碍工程研发中心,重庆400065 [2]重庆邮电大学光纤通信技术重点实验室,重庆400065

出　　处：《计算机应用》2013年第11期3280-3283,共4页journal of Computer Applications

基　　金：国际科技合作计划项目(2010DFA12160)

摘　　要：人耳听觉系统在噪声环境中能够准确定位感兴趣的声源,实现其定位的主要因素是双耳时间差,但是在噪声环境下利用双耳时间差方法进行定位的效果比较差。针对这一问题,提出一个基于耳蜗核模型的声源定位系统。利用耳蜗核模型模拟耳蜗核对听觉信息的处理机制,提取听觉神经纤维中对语声刺激同步的信息和发放率信息,从而实现对噪声的抑制,完成噪声环境下的声源定位。该系统在噪声环境下定位的误差为1.297°。实验结果证明改进之后的声源定位系统能在噪声环境下进行声源定位。The sound can be accurately located by human auditory system in noisy environment. The main element to realize the location is interaural time difference. But the effects are unsatisfactory when using interaural time difference to locate in noisy environment. In order to resolve this problem, this thesis put forward a sound source locating system based on cochlear nucleus model, and cochlear nucleus model simulated the process of how cochlear deals with auditory information. The process could draw the synchronization information and firing rate from the reaction of auditory nerve fibers to sound, thus realizing the inhibitory of noise, and locating the sound source in noisy environment. The location en＇or of system in noisy environment was 1. 297 degrees. The experimental results show that the improved sound locating system can complete locating in noisy environment.

关 键 词：双耳时间差 神经发放 锁相 耳蜗核模型 声源定位 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]