Acoustic source localisation using vibroacoustic beamforming

Karimi, M; Maxit, L

Acoustic source localisation using vibroacoustic beamforming

Karimi, M

Maxit, L

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Publisher:: ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Mechanical Systems and Signal Processing, 2023, 199
Issue Date:: 2023-09-15

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Field	Value	Language
dc.contributor.author	Karimi, M https://orcid.org/0000-0002-2949-5364
dc.contributor.author	Maxit, L
dc.date.accessioned	2023-11-17T01:05:06Z
dc.date.available	2023-11-17T01:05:06Z
dc.date.issued	2023-09-15
dc.identifier.citation	Mechanical Systems and Signal Processing, 2023, 199
dc.identifier.issn	0888-3270
dc.identifier.issn	1096-1216
dc.identifier.uri	http://hdl.handle.net/10453/173449
dc.description.abstract	For acoustic source localisation in a fluid, sound pressure is traditionally measured using a microphone array, and acoustic beamforming is then applied to the pressure signals to localise the source. However, in some engineering applications, it is not feasible to place the microphone/hydrophone array in the fluid to localise an acoustic source. Hence, this work proposes a vibroacoustic beamforming for sound source localisation which applies the beamforming procedure to the measured vibration signals at the surface of a structure in contact with the fluid in which the acoustic source is located. To evaluate the localisation performance of the proposed method, a numerical study is conducted to localise a monopole source in a room using vibration data obtained from an elastic panel on the room wall. To simulate more realistic situation, different levels of signal to noise ratio are considered by moving the source away from the wall-mounted sensors and consequently altering the direct acoustic field (signal). Moreover, commonly used frequency domain beamforming techniques namely conventional beamforming, functional beamforming, minimum variance distortionless response and minimum power distortionless response are applied to the measured signals to localise the source. The performance of each technique is then evaluated by comparing the beamforming output obtained from vibroacoustic beamforming with that of acoustic beamforming and by quantifying the dynamic range and spatial resolution for each method. It can be concluded that vibroacoustic beamforming can be used for acoustic localisation as an alternative to the acoustic beamforming.
dc.language	English
dc.publisher	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
dc.relation.ispartof	Mechanical Systems and Signal Processing
dc.relation.isbasedon	10.1016/j.ymssp.2023.110454
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0913 Mechanical Engineering, 0915 Interdisciplinary Engineering
dc.subject.classification	Acoustics
dc.subject.classification	4006 Communications engineering
dc.subject.classification	4017 Mechanical engineering
dc.title	Acoustic source localisation using vibroacoustic beamforming
dc.type	Journal Article
utslib.citation.volume	199
utslib.for	0905 Civil Engineering
utslib.for	0913 Mechanical Engineering
utslib.for	0915 Interdisciplinary Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2023-11-17T01:05:03Z
pubs.publication-status	Published
pubs.volume	199

Abstract:

For acoustic source localisation in a fluid, sound pressure is traditionally measured using a microphone array, and acoustic beamforming is then applied to the pressure signals to localise the source. However, in some engineering applications, it is not feasible to place the microphone/hydrophone array in the fluid to localise an acoustic source. Hence, this work proposes a vibroacoustic beamforming for sound source localisation which applies the beamforming procedure to the measured vibration signals at the surface of a structure in contact with the fluid in which the acoustic source is located. To evaluate the localisation performance of the proposed method, a numerical study is conducted to localise a monopole source in a room using vibration data obtained from an elastic panel on the room wall. To simulate more realistic situation, different levels of signal to noise ratio are considered by moving the source away from the wall-mounted sensors and consequently altering the direct acoustic field (signal). Moreover, commonly used frequency domain beamforming techniques namely conventional beamforming, functional beamforming, minimum variance distortionless response and minimum power distortionless response are applied to the measured signals to localise the source. The performance of each technique is then evaluated by comparing the beamforming output obtained from vibroacoustic beamforming with that of acoustic beamforming and by quantifying the dynamic range and spatial resolution for each method. It can be concluded that vibroacoustic beamforming can be used for acoustic localisation as an alternative to the acoustic beamforming.

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http://hdl.handle.net/10453/173449