Multichannel active sound control using adaptive filtering
Multichannel active sound control using adaptive filtering
The active control of harmonic sound using multiple secondary sources and multiple error microphones is formulated in a adaptive digital filtering framework. A stochastic gradient algorithm is presented to minimize the sum of the squares of the error microphone outputs by adapting the coefficients of an array of FIR (finite-impulse response) filters driving the secondary sources. The properties and implementation of the algorithm are discussed and some results are presented which demonstrate that the noise at the engine firing frequency inside an automobile can be reduced by 10-15 dB using a practical implementation of such an active sound control system, which had a response time of 0. 1 s in this application.
2590-2593
Elliott, S. J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Nelson, P. A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
1988
Elliott, S. J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Nelson, P. A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
Elliott, S. J. and Nelson, P. A.
(1988)
Multichannel active sound control using adaptive filtering.
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Conference or Workshop Item
(Paper)
Abstract
The active control of harmonic sound using multiple secondary sources and multiple error microphones is formulated in a adaptive digital filtering framework. A stochastic gradient algorithm is presented to minimize the sum of the squares of the error microphone outputs by adapting the coefficients of an array of FIR (finite-impulse response) filters driving the secondary sources. The properties and implementation of the algorithm are discussed and some results are presented which demonstrate that the noise at the engine firing frequency inside an automobile can be reduced by 10-15 dB using a practical implementation of such an active sound control system, which had a response time of 0. 1 s in this application.
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Published date: 1988
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Copyright 2004 Elsevier B.V., All rights reserved.
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Local EPrints ID: 468662
URI: http://eprints.soton.ac.uk/id/eprint/468662
PURE UUID: a6b5fed2-e222-446b-ab86-0b1a79377437
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Date deposited: 19 Aug 2022 17:09
Last modified: 20 Aug 2022 01:31
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