Enhancing accuracy of source localization in high reverberation environment with microphone array

Abstract

Array processing involves the use of multiple microphones to receive or transmit a signal carried by propagating waves. The classical method for source localization with microphone array is assumed to be Time Delay Estimation (TDE). Recently more attention is paid to another technique, interaural level difference (ILD) which estimates location of sound source by energy ratio that received from different microphones. In this paper we introduce a method based on combination of time delay likelihood and ILD that estimates source location in 2-D environment by two microphones. Results of experiments show that accuracy of this method is much better than previous methods proposed in this manner under normal conditions. © 2008 Springer-Verlag.