Sound source localisation and signal extraction with multiple microphone arrays

Chaoying Bao, Ling Jia, Brendan Coral, David Mathews, Hongmei Sun, Jie Pan

Research output: Chapter in Book/Conference paperConference paper

Abstract

The idea of applying the microphone array technology for machine condition monitoring of a mine site has been investigated at the University of Western Australia. As a key part of the investigation, this paper focuses on the sound source localisation and signal extraction using the beamforming technique. Instead of a single large array, multiple small arrays are used, as practically, they can be easily deployed. In terms of array processing, they are normally processed as independent arrays. However, with synchronised sampling they can also be processed as a single combined array. These two processing approaches are termed the independent array approach (IAA) and the synchronised array approach (SAA), respectively. The main advantage of SAA is its greater array gain and higher beam resolution. However, the arrays need to be placed close to one another to avoid producing aliasing lobes. The IAA on the other hand has no such restrictions and the arrays can be placed independently in any position. This may provide gains in signal to interference and noise ratio (SINR) for individual sound sources in certain circumstances. In order to compare the performance of the two approaches under various conditions, numerical simulations are carried out. The performances are evaluated in terms of the accuracy of source localisation and the fidelity of signal extraction. The general guideline for using the two approaches is provided.

Original languageEnglish
Title of host publicationAustralian Acoustical Society Annual Conference, AAS 2018
Place of PublicationAustralia
PublisherAustralian Acoustical Society
Pages492-500
Number of pages9
ISBN (Electronic)9781510877382
Publication statusPublished - 1 Jan 2019
Event2018 Australian Acoustical Society Annual Conference, AAS 2018 - Adelaide, Australia
Duration: 6 Nov 20189 Nov 2018

Publication series

NameAustralian Acoustical Society Annual Conference, AAS 2018

Conference

Conference2018 Australian Acoustical Society Annual Conference, AAS 2018
CountryAustralia
CityAdelaide
Period6/11/189/11/18

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