Sound radiation from a perforated unbaffled plate
Sound radiation from a perforated unbaffled plate
A model to calculate the sound radiation from an unbaffled perforated plate is proposed. This is
achieved by modifying an existing model of an unbaffled plate to include the effect of perforation
in terms of a continuously distributed surface impedance to represent the holes. Results are
compared with those of an idealised situation, a perforated plate in an equally perforated baffle.
At low perforation ratios, the radiation efficiency is lower for the unbaffled case but as the
perforation ratio increases, the results for both conditions become similar. The effect of
perforation increases as the perforation ratio increases and also as the hole diameter reduces.
Comparison with existing measurement is also found to give a good agreement.
8487985122
Sociedad Española de Acústica
Putra, A.
23a00af7-4bfa-4537-8ada-75707718a36c
Thompson, D.J.
bca37fd3-d692-4779-b663-5916b01edae5
2007
Putra, A.
23a00af7-4bfa-4537-8ada-75707718a36c
Thompson, D.J.
bca37fd3-d692-4779-b663-5916b01edae5
Putra, A. and Thompson, D.J.
(2007)
Sound radiation from a perforated unbaffled plate.
Calvo-Manzano, Antonio, Pérez-López, Antonio and Santiago, Salvador
(eds.)
In 19th International Congress on Acoustics: Acoustics for the 21st Century.
Sociedad Española de Acústica..
Record type:
Conference or Workshop Item
(Paper)
Abstract
A model to calculate the sound radiation from an unbaffled perforated plate is proposed. This is
achieved by modifying an existing model of an unbaffled plate to include the effect of perforation
in terms of a continuously distributed surface impedance to represent the holes. Results are
compared with those of an idealised situation, a perforated plate in an equally perforated baffle.
At low perforation ratios, the radiation efficiency is lower for the unbaffled case but as the
perforation ratio increases, the results for both conditions become similar. The effect of
perforation increases as the perforation ratio increases and also as the hole diameter reduces.
Comparison with existing measurement is also found to give a good agreement.
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Published date: 2007
Venue - Dates:
19th International Congress on Acoustics: Acoustics for the 21st Century (ICA2007), Madrid, Spain, 2007-09-03 - 2007-09-07
Identifiers
Local EPrints ID: 50454
URI: http://eprints.soton.ac.uk/id/eprint/50454
ISBN: 8487985122
PURE UUID: cbdfd54e-ec30-4772-9b5e-8fe8dbadc75f
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Date deposited: 27 Feb 2008
Last modified: 16 Mar 2024 02:54
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Contributors
Author:
A. Putra
Editor:
Antonio Calvo-Manzano
Editor:
Antonio Pérez-López
Editor:
Salvador Santiago
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