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Active control of broadband sound through the open aperture of a fullsized domestic window

Active control of broadband sound through the open aperture of a fullsized domestic window
Active control of broadband sound through the open aperture of a fullsized domestic window
Shutting the window is usually the last resort in mitigating environmental noise, at the expense of natural ventilation. We describe an active sound control system fitted onto the opening of the domestic window that attenuates the incident sound, achieving a global reduction in the room interior while maintaining natural ventilation. The incident sound is actively attenuated by an array of control modules (a small loudspeaker) distributed optimally across the aperture. A single reference microphone provides advance information for the controller to compute the anti-noise signal input to the loudspeakers in real-time. A numerical analysis revealed that the maximum active attenuation potential outperforms the perfect acoustic insulation provided by a fully shut single-glazed window in ideal conditions. To determine the real-world performance of such an active control system, an experimental system is realized in the aperture of a full-sized window installed on a mockup room. Up to 10-dB reduction in energy-averaged sound pressure level was achieved by the active control system in the presence of a recorded real-world broadband noise. However, attenuation in the low-frequency range and its maximum power output is limited by the size of the loudspeakers.
2045-2322
Lam, Bhan
aafb1b4c-ce14-4909-97f4-9775b11f4348
Shi, Dongyuan
20b1a768-6034-462a-a9c1-6c6a7a643650
Gan, Woon-Seng
1936c59c-0552-498c-86a4-20bb81bb561a
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Nishimura, Masaharu
e72c884f-ff4c-4716-96cd-ef91f713e7c6
Lam, Bhan
aafb1b4c-ce14-4909-97f4-9775b11f4348
Shi, Dongyuan
20b1a768-6034-462a-a9c1-6c6a7a643650
Gan, Woon-Seng
1936c59c-0552-498c-86a4-20bb81bb561a
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Nishimura, Masaharu
e72c884f-ff4c-4716-96cd-ef91f713e7c6

Lam, Bhan, Shi, Dongyuan, Gan, Woon-Seng, Elliott, Stephen and Nishimura, Masaharu (2020) Active control of broadband sound through the open aperture of a fullsized domestic window. Scientific Reports, 10 (1), [10021]. (doi:10.1038/s41598-020-66563-z).

Record type: Article

Abstract

Shutting the window is usually the last resort in mitigating environmental noise, at the expense of natural ventilation. We describe an active sound control system fitted onto the opening of the domestic window that attenuates the incident sound, achieving a global reduction in the room interior while maintaining natural ventilation. The incident sound is actively attenuated by an array of control modules (a small loudspeaker) distributed optimally across the aperture. A single reference microphone provides advance information for the controller to compute the anti-noise signal input to the loudspeakers in real-time. A numerical analysis revealed that the maximum active attenuation potential outperforms the perfect acoustic insulation provided by a fully shut single-glazed window in ideal conditions. To determine the real-world performance of such an active control system, an experimental system is realized in the aperture of a full-sized window installed on a mockup room. Up to 10-dB reduction in energy-averaged sound pressure level was achieved by the active control system in the presence of a recorded real-world broadband noise. However, attenuation in the low-frequency range and its maximum power output is limited by the size of the loudspeakers.

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Engineering Reducing noise transmitted through an open window - Accepted Manuscript
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More information

Accepted/In Press date: 19 May 2020
e-pub ahead of print date: 9 July 2020
Published date: 1 December 2020
Additional Information: Funding Information: This research is supported by the Singapore Ministry of National Development and the National Research Foundation, Prime Minister’s Office under the Cities of Tomorrow (CoT) Research Programme (CoT Award No. COT-V4-2019-1). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not reflect the views of the Singapore Ministry of National Development and National Research Foundation, Prime Minister’s Office, Singapore. Publisher Copyright: © 2020, The Author(s).

Identifiers

Local EPrints ID: 443418
URI: http://eprints.soton.ac.uk/id/eprint/443418
ISSN: 2045-2322
PURE UUID: da2b8d07-56be-4abb-8574-8880d60d9abd

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Date deposited: 24 Aug 2020 16:37
Last modified: 16 Mar 2024 09:00

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Contributors

Author: Bhan Lam
Author: Dongyuan Shi
Author: Woon-Seng Gan
Author: Stephen Elliott
Author: Masaharu Nishimura

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