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

Abstract

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 error 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.