A Multiplanes Geometric Approach for Sound Source Localization with TDOA

Abstract

This study mitigates the effect of sampling errors that comes from sampling rate in reality when localizing the sound source. In general, the sampling errors may make sound source localization that uses multi-hyperboloids method, for example, time difference of arrival (TDOA), have wrong sound source estimation or do not work. Due to alleviate the wrong source estimation, a geometric approach that transfers from multi-hyperboloids to multiplanes for sound source localization is proposed. This study also added a discriminant for check of different TDOAs conditions. Because of the easy realization for embedded systems, the closely spaced microphone array was used in this study. From experiments, the propose method successful improve the accuracy and validity of the source estimation.