An investigation into the performance limitations of active acoustic cloaking using an acoustic quiet-zone
An investigation into the performance limitations of active acoustic cloaking using an acoustic quiet-zone
The use of active control to acoustically cloak an object has been demonstrated previously, and is effective if the scattered component of the pressure field can be measured and directly minimised. In practice, this is non-trivial as a pressure sensor in the sound-field will detect the superposition of the incident and scattered pressures. An alternative approach has been proposed in the literature, using high-order multipole sources to generate a zone of quiet around the scattering object, whilst not radiating into the far-field. This approach performs well, however the use of high-order multipole sources is infeasible for a practical implementation. This paper will explore the limitations of the quiet-zone acoustic cloaking strategy on simulated data of a rigid spherical scattering object, using a practical arrangement of monopole control sources and error sensors. The same arrangement of sources and sensors is also used to directly minimise the scattered sound field, and the two approaches are compared in terms of practicality, control-effort, and performance.
Acoustic Cloaking, Active Control, Acoustic Scattering, Quiet-Zone
House, Charlie
15d5f04a-da71-4435-9b8c-6bf50d8e7908
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
13 November 2019
House, Charlie
15d5f04a-da71-4435-9b8c-6bf50d8e7908
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
House, Charlie, Cheer, Jordan and Daley, Stephen
(2019)
An investigation into the performance limitations of active acoustic cloaking using an acoustic quiet-zone.
178th Meeting of the Acoustical Society of America, Coronado Island, San Diego, United States.
02 - 06 Dec 2019.
10 pp
.
(doi:10.1121/2.0001190).
Record type:
Conference or Workshop Item
(Paper)
Abstract
The use of active control to acoustically cloak an object has been demonstrated previously, and is effective if the scattered component of the pressure field can be measured and directly minimised. In practice, this is non-trivial as a pressure sensor in the sound-field will detect the superposition of the incident and scattered pressures. An alternative approach has been proposed in the literature, using high-order multipole sources to generate a zone of quiet around the scattering object, whilst not radiating into the far-field. This approach performs well, however the use of high-order multipole sources is infeasible for a practical implementation. This paper will explore the limitations of the quiet-zone acoustic cloaking strategy on simulated data of a rigid spherical scattering object, using a practical arrangement of monopole control sources and error sensors. The same arrangement of sources and sensors is also used to directly minimise the scattered sound field, and the two approaches are compared in terms of practicality, control-effort, and performance.
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Published date: 13 November 2019
Venue - Dates:
178th Meeting of the Acoustical Society of America, Coronado Island, San Diego, United States, 2019-12-02 - 2019-12-06
Keywords:
Acoustic Cloaking, Active Control, Acoustic Scattering, Quiet-Zone
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Local EPrints ID: 436593
URI: http://eprints.soton.ac.uk/id/eprint/436593
PURE UUID: 7fa10eb0-545f-4e40-a801-2d4d28551ed7
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Date deposited: 17 Dec 2019 17:30
Last modified: 17 Mar 2024 03:22
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