Structural-acoustic coupling and psychophysical effects in the active control of noise in vehicles
Structural-acoustic coupling and psychophysical effects in the active control of noise in vehicles
Active noise control systems offer a potential method of reducing the weight of passive acoustic treatment and, therefore, increasing vehicles' fuel efficiency. These can be particularly cost-efficient if integrated with the entertainment system. A combined system is presented employing feedforward control of engine noise and feedback control of road noise, using a `modal' error signal. Due to the dependence of the feedback system on the modal response of the vehicle cabin, the influence of structural-acoustic coupling on this response and the consequent effects on the control performance are investigated. Simulations of the performance of the control systems in rigid and non-rigid enclosures show that the feedforward component is largely unaffected by structural-acoustic coupling, whilst the modal feedback performance is reduced by 3 dB due to the shift in the frequency of the targeted acoustic mode. The simulation results are confirmed through experiments conducted in a structural-acoustic coupled enclosure.
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Abbott, Mark
07935b2d-bfdb-4be2-96bd-587e0f3b7721
Elliott, Stephen J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
14 September 2011
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Abbott, Mark
07935b2d-bfdb-4be2-96bd-587e0f3b7721
Elliott, Stephen J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Cheer, Jordan, Abbott, Mark and Elliott, Stephen J.
(2011)
Structural-acoustic coupling and psychophysical effects in the active control of noise in vehicles.
In Proceedings of the Institute of Acoustics.
Institute of Acoustics..
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Conference or Workshop Item
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Abstract
Active noise control systems offer a potential method of reducing the weight of passive acoustic treatment and, therefore, increasing vehicles' fuel efficiency. These can be particularly cost-efficient if integrated with the entertainment system. A combined system is presented employing feedforward control of engine noise and feedback control of road noise, using a `modal' error signal. Due to the dependence of the feedback system on the modal response of the vehicle cabin, the influence of structural-acoustic coupling on this response and the consequent effects on the control performance are investigated. Simulations of the performance of the control systems in rigid and non-rigid enclosures show that the feedforward component is largely unaffected by structural-acoustic coupling, whilst the modal feedback performance is reduced by 3 dB due to the shift in the frequency of the targeted acoustic mode. The simulation results are confirmed through experiments conducted in a structural-acoustic coupled enclosure.
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Structural-acoustic coupling and psyhophysical effects in the active control of noise in vehicles.pdf
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Published date: 14 September 2011
Venue - Dates:
Acoustics 2011, Glasgow, United Kingdom, 2011-09-14 - 2011-09-15
Organisations:
Signal Processing & Control Grp
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Local EPrints ID: 352695
URI: http://eprints.soton.ac.uk/id/eprint/352695
PURE UUID: 6b71631e-a8e8-4869-8dbf-d904e3494964
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Date deposited: 21 May 2013 09:03
Last modified: 15 Mar 2024 03:37
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Author:
Mark Abbott
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