Active control of broadband sound through the open aperture of a full-sized 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 whi...

Full description

Saved in:
Bibliographic Details
Main Authors: Lam, Bhan, Shi, Dongyuan, Gan, Woon-Seng, Elliott, Stephen J., Nishimura, Masaharu
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2021
Subjects:
Online Access:https://hdl.handle.net/10356/146090
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-146090
record_format dspace
spelling sg-ntu-dr.10356-1460902021-01-26T07:25:37Z Active control of broadband sound through the open aperture of a full-sized domestic window Lam, Bhan Shi, Dongyuan Gan, Woon-Seng Elliott, Stephen J. Nishimura, Masaharu School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Electrical and Electronic Engineering Mechanical Engineering 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. Ministry of National Development (MND) National Research Foundation (NRF) Published version 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. 2021-01-26T07:25:36Z 2021-01-26T07:25:36Z 2020 Journal Article Lam, B., Shi, D., Gan, W.-S., Elliott, S. J., & Nishimura, M. (2020). Active control of broadband sound through the open aperture of a full-sized domestic window. Scientific Reports, 10(1), 10021-. doi:10.1038/s41598-020-66563-z 2045-2322 https://hdl.handle.net/10356/146090 10.1038/s41598-020-66563-z 32647266 2-s2.0-85087821540 1 10 en COT-V4-2019-1 Scientific Reports © 2020 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
Electrical and Electronic Engineering
Mechanical Engineering
spellingShingle Engineering::Electrical and electronic engineering
Electrical and Electronic Engineering
Mechanical Engineering
Lam, Bhan
Shi, Dongyuan
Gan, Woon-Seng
Elliott, Stephen J.
Nishimura, Masaharu
Active control of broadband sound through the open aperture of a full-sized domestic window
description 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.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Lam, Bhan
Shi, Dongyuan
Gan, Woon-Seng
Elliott, Stephen J.
Nishimura, Masaharu
format Article
author Lam, Bhan
Shi, Dongyuan
Gan, Woon-Seng
Elliott, Stephen J.
Nishimura, Masaharu
author_sort Lam, Bhan
title Active control of broadband sound through the open aperture of a full-sized domestic window
title_short Active control of broadband sound through the open aperture of a full-sized domestic window
title_full Active control of broadband sound through the open aperture of a full-sized domestic window
title_fullStr Active control of broadband sound through the open aperture of a full-sized domestic window
title_full_unstemmed Active control of broadband sound through the open aperture of a full-sized domestic window
title_sort active control of broadband sound through the open aperture of a full-sized domestic window
publishDate 2021
url https://hdl.handle.net/10356/146090
_version_ 1690658491202535424