Performance Comparison of UCA and UCCA based Real-time Sound Source Localization Systems using Circular Harmonics SRP Method

TL;DR

This paper compares real-time sound source localization systems using UCA and UCCA microphone arrays with a focus on circular harmonics SRP, demonstrating UCCA's superior performance in real-room experiments.

Contribution

It provides a real-time implementation and performance comparison of UCA and UCCA based SSL systems using circular harmonics SRP, highlighting the advantages of UCCA.

Findings

UCCA outperforms UCA in real-room experiments

Circular harmonics SRP enables efficient broadband localization

Parameter settings significantly affect system performance

Abstract

Many sound source localization (SSL) algorithms based on circular microphone array (CMA), including uniform circular array (UCA) and uniform concentric circular array (UCCA), have been well developed and verified via computer simulations and offline processing. On the other hand, beamforming in the harmonic domain has been shown to be a very efficient tool for broadband sound source localization due to its frequency-invariant properties. In this paper, design, implementation, and performance of a real-time sound source localization system are discussed. Specifically, we analyze the effect of parameter settings and compare the performance between UCA and UCCA through real-time experiments in a real room. The proposed method shows significant improvement by using UCCA instead of UCA.