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Active control of scattered acoustic fields: cancellation, reproduction and cloaking

Active control of scattered acoustic fields: cancellation, reproduction and cloaking
Active control of scattered acoustic fields: cancellation, reproduction and cloaking
The active control of sound fields has been widely applied in both active noise control and sound field reproduction, however, relatively few studies have focused on active acoustic cloaking. In order to build upon the knowledge and understanding in the areas of active noise control and sound field reproduction, this paper investigates their physical limitations and compares them to the active cloaking problem when the three strategies are employed in the presence of an acoustic scatterer. The three sound field control strategies have been formulated within a consistent framework, and this has enabled insight into the physical control mechanisms. Two different three-dimensional scattering problems have then been simulated and used to investigate the performance limitations of the three strategies. The influence of the number of control sources and their proximity to the scattering object have been investigated, and it has been shown that the requirements for active cloaking differ from those for active noise control and sound field reproduction. Specifically, it has been shown that there is a clear distinction between controlling the internal and external sound fields in the three cases.
acoustics, active noise control, qctive cloaking, sound field control
0001-4966
1-24
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc

Cheer, Jordan (2016) Active control of scattered acoustic fields: cancellation, reproduction and cloaking. Journal of the Acoustical Society of America, 140 (3), 1-24. (doi:10.1121/1.4962284).

Record type: Article

Abstract

The active control of sound fields has been widely applied in both active noise control and sound field reproduction, however, relatively few studies have focused on active acoustic cloaking. In order to build upon the knowledge and understanding in the areas of active noise control and sound field reproduction, this paper investigates their physical limitations and compares them to the active cloaking problem when the three strategies are employed in the presence of an acoustic scatterer. The three sound field control strategies have been formulated within a consistent framework, and this has enabled insight into the physical control mechanisms. Two different three-dimensional scattering problems have then been simulated and used to investigate the performance limitations of the three strategies. The influence of the number of control sources and their proximity to the scattering object have been investigated, and it has been shown that the requirements for active cloaking differ from those for active noise control and sound field reproduction. Specifically, it has been shown that there is a clear distinction between controlling the internal and external sound fields in the three cases.

Text
Sound Field Control - Cancelation, Reprdocution and Cloaking.pdf - Accepted Manuscript
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More information

Accepted/In Press date: 11 August 2016
Published date: 2 September 2016
Keywords: acoustics, active noise control, qctive cloaking, sound field control
Organisations: Signal Processing & Control Grp

Identifiers

Local EPrints ID: 399437
URI: https://eprints.soton.ac.uk/id/eprint/399437
ISSN: 0001-4966
PURE UUID: 82b4ab6d-0862-40bc-9857-381cb3b41a24
ORCID for Jordan Cheer: ORCID iD orcid.org/0000-0002-0552-5506

Catalogue record

Date deposited: 17 Aug 2016 15:10
Last modified: 06 Jun 2018 12:32

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