Active control of low-frequency random sound in enclosures
Active control of low-frequency random sound in enclosures
This paper evaluates the degree to which active methods can be used to reduce the level of sound‐pressure fluctuations in an enclosure excited at low frequencies by a stationary random source. The spectral density of the total acoustic potential energy in the enclosure is used as a cost function for evaluating the global effectiveness of the technique. The enclosure is controlled by a secondary source whose output is constrained to act causally with respect to the primary source. The optimal causal filter relating the secondary source output to the primary source output can be deduced using classical Wiener filter theory. A numerical approach is adopted for the solution of the resulting Wiener–Hopf integral equation. It is shown that the resonances of the enclosure can be successfully suppressed by the action of the active control.
Joplin, P.M.
14ca8437-9208-42ad-8a0d-0c5ad9c2a59c
Nelson, P.A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
4 June 1998
Joplin, P.M.
14ca8437-9208-42ad-8a0d-0c5ad9c2a59c
Nelson, P.A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
Joplin, P.M. and Nelson, P.A.
(1998)
Active control of low-frequency random sound in enclosures.
Journal of the Acoustical Society of America, 87 (6), [2396].
(doi:10.1121/1.399085).
Abstract
This paper evaluates the degree to which active methods can be used to reduce the level of sound‐pressure fluctuations in an enclosure excited at low frequencies by a stationary random source. The spectral density of the total acoustic potential energy in the enclosure is used as a cost function for evaluating the global effectiveness of the technique. The enclosure is controlled by a secondary source whose output is constrained to act causally with respect to the primary source. The optimal causal filter relating the secondary source output to the primary source output can be deduced using classical Wiener filter theory. A numerical approach is adopted for the solution of the resulting Wiener–Hopf integral equation. It is shown that the resonances of the enclosure can be successfully suppressed by the action of the active control.
This record has no associated files available for download.
More information
Accepted/In Press date: 14 January 1990
Published date: 4 June 1998
Identifiers
Local EPrints ID: 468674
URI: http://eprints.soton.ac.uk/id/eprint/468674
ISSN: 0001-4966
PURE UUID: 2cb7e6f4-b4c7-41ce-88b3-29a18327af6f
Catalogue record
Date deposited: 19 Aug 2022 17:22
Last modified: 17 Mar 2024 02:32
Export record
Altmetrics
Contributors
Author:
P.M. Joplin
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
