SOUND LOCALIZATION IN REVERBERANT ENVIRONMENT BASED ON THE MODEL OF THE PRECEDENCE EFFECT

This paper presents a model-based method for sound localization of con current and continuous speech sources in reverberant environment. A ne w algorithm adopted from the echo-avoidance model of the precedence ef fect was used to detect the echo-free onsets by specifying a generaliz ed pattern of impulse response, Fine structure time differences were c alculated from the zero-crossing points in different microphones, They were integrated into an azimuth histogram by the restrictions between them, Two sound sources were localized in both an anechoic chamber an d a normal room which has walls, floor, and ceiling made of concrete, The time segment needed for localization was 0.5-2 s and the accuracy was a fem degrees in both environments.