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Maximization of acoustic energy difference between two spaces

Maximization of acoustic energy difference between two spaces
Maximization of acoustic energy difference between two spaces
There has recently been an increasing interest in the generation of a sound field that is audible in one spatial region and inaudible in an adjacent region. The method proposed here ensures the control of the amplitude and phase of multiple acoustic sources in order to maximize the acoustic energy difference between two adjacent regions while also ensuring that evenly distributed source strengths are used. The performance of the method proposed is evaluated by computer simulations and experiments with real loudspeaker arrays in the shape of a circle and a sphere. The proposed method gives an improvement in the efficiency of radiation into the space in which the sound should be audible, while maintaining the acoustic pressure difference between two acoustic spaces. This is shown to give an improvement of performance compared to the contrast control method previously proposed
0001-4966
121-131
Shin, M.
2c911163-f027-4c79-8a7b-368f326c46e7
Lee, S.Q.
a918ab40-3745-40f5-a70c-ef3ca33a2305
Fazi, F.M.
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Nelson, P.A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
Kim, D.
f41dc51b-2766-4d68-a3ed-7757ee2ae76e
Wang, S.
a2223997-9f42-425b-b0c6-1bcb64d9b8fc
Park, J.
3db7ee0d-9f71-4e58-b39b-84b423f5b8a5
Seo, J.
9e2e88a5-8c8b-4256-96ea-bbc9b8bbc369
Shin, M.
2c911163-f027-4c79-8a7b-368f326c46e7
Lee, S.Q.
a918ab40-3745-40f5-a70c-ef3ca33a2305
Fazi, F.M.
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Nelson, P.A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
Kim, D.
f41dc51b-2766-4d68-a3ed-7757ee2ae76e
Wang, S.
a2223997-9f42-425b-b0c6-1bcb64d9b8fc
Park, J.
3db7ee0d-9f71-4e58-b39b-84b423f5b8a5
Seo, J.
9e2e88a5-8c8b-4256-96ea-bbc9b8bbc369

Shin, M., Lee, S.Q., Fazi, F.M., Nelson, P.A., Kim, D., Wang, S., Park, J. and Seo, J. (2010) Maximization of acoustic energy difference between two spaces Journal of the Acoustical Society of America, 128, (1), pp. 121-131. (doi:10.1121/1.3438479).

Record type: Article

Abstract

There has recently been an increasing interest in the generation of a sound field that is audible in one spatial region and inaudible in an adjacent region. The method proposed here ensures the control of the amplitude and phase of multiple acoustic sources in order to maximize the acoustic energy difference between two adjacent regions while also ensuring that evenly distributed source strengths are used. The performance of the method proposed is evaluated by computer simulations and experiments with real loudspeaker arrays in the shape of a circle and a sphere. The proposed method gives an improvement in the efficiency of radiation into the space in which the sound should be audible, while maintaining the acoustic pressure difference between two acoustic spaces. This is shown to give an improvement of performance compared to the contrast control method previously proposed

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More information

Published date: June 2010
Organisations: Inst. Sound & Vibration Research, Fluid Dynamics & Acoustics Group

Identifiers

Local EPrints ID: 151327
URI: http://eprints.soton.ac.uk/id/eprint/151327
ISSN: 0001-4966
PURE UUID: 8355d044-9190-4598-98d3-7ac20f3eaafc

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Date deposited: 10 May 2010 13:06
Last modified: 18 Jul 2017 12:55

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Contributors

Author: M. Shin
Author: S.Q. Lee
Author: F.M. Fazi
Author: P.A. Nelson
Author: D. Kim
Author: S. Wang
Author: J. Park
Author: J. Seo

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