Design of a wideband linear microphone array for high-quality audio recording

Zhou, H; Lu, J; Qiu, X

Design of a wideband linear microphone array for high-quality audio recording

Zhou, H Lu, J Qiu, X

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Publication Type:: Journal Article
Citation:: AES: Journal of the Audio Engineering Society, 2018, 66 (3), pp. 154 - 166
Issue Date:: 2018-03-01

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Field	Value	Language
dc.contributor.author	Zhou, H	en_US
dc.contributor.author	Lu, J	en_US
dc.contributor.author	Qiu, X https://orcid.org/0000-0002-5181-1220	en_US
dc.date.issued	2018-03-01	en_US
dc.identifier.citation	AES: Journal of the Audio Engineering Society, 2018, 66 (3), pp. 154 - 166	en_US
dc.identifier.issn	1549-4950	en_US
dc.identifier.uri	http://hdl.handle.net/10453/129864
dc.description.abstract	© 2018 Audio Engineering Society. All Rights Reserved. Linear microphone arrays with unequally spaced elements enable high wideband directivity with a small number of microphones. In this engineering report a general procedure for designing wideband linear microphone arrays steering at the endfire direction with unequally spaced elements is proposed for high quality audio recording from 20 Hz to 16 kHz. The simulated annealing method is used to optimize the spatial distribution iteratively for microphones that do not need to have matched amplitude and phase. The challenge in the optimization process is that the operations of large matrices needed for the wide bandwidth bring large accumulation error, thus the optimization process needs to be carefully regularized with the error being restricted to a relatively small tolerable level. The optimized microphone distributions and the beampatterns of arrays with different number of microphones are presented in simulations, and their directivities are compared with that of a same-length shotgun microphone. Finally, experiments were carried out to demonstrate that the microphone array designed with the proposed method outperforms the same-length shotgun microphone significantly in directivity while maintaining a comparable low self-noise level.	en_US
dc.relation.ispartof	AES: Journal of the Audio Engineering Society	en_US
dc.relation.isbasedon	10.17743/jaes.2018.0004	en_US
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Acoustics	en_US
dc.title	Design of a wideband linear microphone array for high-quality audio recording	en_US
dc.type	Journal Article
utslib.citation.volume	3	en_US
utslib.citation.volume	66	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
utslib.for	0915 Interdisciplinary Engineering	en_US
utslib.for	1005 Communications Technologies	en_US
pubs.embargo.period	Not known	en_US
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	*
pubs.issue	3	en_US
pubs.publication-status	Published	en_US
pubs.volume	66	en_US

Abstract:

© 2018 Audio Engineering Society. All Rights Reserved. Linear microphone arrays with unequally spaced elements enable high wideband directivity with a small number of microphones. In this engineering report a general procedure for designing wideband linear microphone arrays steering at the endfire direction with unequally spaced elements is proposed for high quality audio recording from 20 Hz to 16 kHz. The simulated annealing method is used to optimize the spatial distribution iteratively for microphones that do not need to have matched amplitude and phase. The challenge in the optimization process is that the operations of large matrices needed for the wide bandwidth bring large accumulation error, thus the optimization process needs to be carefully regularized with the error being restricted to a relatively small tolerable level. The optimized microphone distributions and the beampatterns of arrays with different number of microphones are presented in simulations, and their directivities are compared with that of a same-length shotgun microphone. Finally, experiments were carried out to demonstrate that the microphone array designed with the proposed method outperforms the same-length shotgun microphone significantly in directivity while maintaining a comparable low self-noise level.

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http://hdl.handle.net/10453/129864