On the active absorption of sound
On the active absorption of sound
The maximum sound power that can be absorbed from an incident plane wave by a point monopole source is equivalent to that provided by a perfectly absorbing circular area of one wavelength in circumference. A point dipole source and a longitudinal point quadrupole source, whose axes are in the direction of travel of the wave, can absorb three and five times this power, respectively. Thus the strengths of two equal and opposite forces increase in inverse proportion to their separation distance such that the combination of the forces reduces to that of the longitudinal quadrupole.
601-606
Nelson, P. A.
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Curtis, A. R.D.
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Elliott, S. J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
23 July 1986
Nelson, P. A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
Curtis, A. R.D.
79ce7e69-6528-4453-ac93-9f80c0bfc340
Elliott, S. J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Nelson, P. A., Curtis, A. R.D. and Elliott, S. J.
(1986)
On the active absorption of sound.
In Proceedings of Inter-Noise.
vol. 1,
Noise Control Foundation.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
The maximum sound power that can be absorbed from an incident plane wave by a point monopole source is equivalent to that provided by a perfectly absorbing circular area of one wavelength in circumference. A point dipole source and a longitudinal point quadrupole source, whose axes are in the direction of travel of the wave, can absorb three and five times this power, respectively. Thus the strengths of two equal and opposite forces increase in inverse proportion to their separation distance such that the combination of the forces reduces to that of the longitudinal quadrupole.
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Published date: 23 July 1986
Additional Information:
Published Online: 26 August 1998
Venue - Dates:
International Conference on Noise Control Engineering, Progress in Noise Control: Inter-Noise 86, Massachusetts Institute of Technology, Massachusetts, United States, 1986-07-21 - 1986-07-23
Identifiers
Local EPrints ID: 468811
URI: http://eprints.soton.ac.uk/id/eprint/468811
PURE UUID: 5b10d1f2-f42f-4bf4-85fb-9d23f2086582
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Date deposited: 25 Aug 2022 17:23
Last modified: 06 Jun 2024 01:31
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Author:
A. R.D. Curtis
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