Robust acoustic speaker localization with distributed microphones

Abstract

This contribution to acoustic source localization presents a robust approach verified with ten distributed microphones in a laboratory apartment under reverberant acoustic conditions. Based on the classical steered response power phase transform (SRP-PHAT) algorithm, three optional extensions are presented: A method for selecting suitable microphone pairs, a spatial Wiener-type filtering for the suppression of artifacts in the spatial likelihood function (stemming from background noise), and finally smoothing of the spatial likelihood function. Simulation results show a significant improvement compared to SRP-PHAT in all noise conditions.