Geometrical arrangement of microphone array for accuracy enhancement in sound source localization

Jwu-Sheng Hu*, Chieh Min Tsai, Chen Yu Chan, Yung Jung Chang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Scopus citations

Abstract

This work derives an optimal structure of microphone array for sound source localization under the conditions of fixed microphone numbers limited distance between each microphone pair and different signal-to-noise ratios (SNR). The location estimation algorithm is based on the time difference of arrival (TDOA) of each microphone pair. The estimation accuracy is influenced by the TDOA errors and is dependent on the microphone array geometry. This work proposes a geometry optimization formulation using the relationship between the singular values of the estimation matrix and the estimation error. Under the far field condition, an analytical solution can be derived to minimize the Cramer-Rao Lower Bound (CRLB). In near field, the result leads to a set of nonlinear equations and is source location dependent. With additional constraints, several numerical solutions are discussed.

Original languageEnglish
Title of host publicationASCC 2011 - 8th Asian Control Conference - Final Program and Proceedings
Pages299-304
Number of pages6
StatePublished - 29 Aug 2011
Event8th Asian Control Conference, ASCC 2011 - Kaohsiung, Taiwan
Duration: 15 May 201118 May 2011

Publication series

NameASCC 2011 - 8th Asian Control Conference - Final Program and Proceedings

Conference

Conference8th Asian Control Conference, ASCC 2011
CountryTaiwan
CityKaohsiung
Period15/05/1118/05/11

Keywords

  • geometrical arrangement
  • microphonearray
  • optimization
  • sound source localization

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