Active control of sound through full-sized open windows

There is a pressing need to address urban sustainability challenges of increasing ambient temperatures and noise levels in densely-populated, high-rise cities. Solutions that utilise active noise control on open windows to reduce indoor noise levels seem promising, as natural ventilation is still m...

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Main Authors: Lam, Bhan, Shi, Chuang, Shi, Dongyuan, Gan, Woon-Seng
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2019
Subjects:
Online Access:https://hdl.handle.net/10356/106104
http://hdl.handle.net/10220/47925
http://dx.doi.org/10.1016/j.buildenv.2018.05.042
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1061042019-12-06T22:04:38Z Active control of sound through full-sized open windows Lam, Bhan Shi, Chuang Shi, Dongyuan Gan, Woon-Seng School of Electrical and Electronic Engineering Finite Element Method DRNTU::Engineering::Electrical and electronic engineering Active Noise Control There is a pressing need to address urban sustainability challenges of increasing ambient temperatures and noise levels in densely-populated, high-rise cities. Solutions that utilise active noise control on open windows to reduce indoor noise levels seem promising, as natural ventilation is still maintained. Active noise control utilizes acoustic transducers arranged around the open window to generate a secondary incidence noise that destructively interferes with the real noise. The two most common techniques of transducer arrangement, distributed and boundary layouts, are investigated for the typical single-glazed sliding window. Finite element method is used to establish the control performance of the active noise control system and the passive attenuation provided by the sliding window. Based on the investigated fundamental limits of active control, the distributed layout has consistently yielded better performance than the boundary layout. The distributed-layout method can also reduce noise more effectively than a fully-glazed window. Moreover, sources distributed only in the partial opening of a simulated sliding window can attenuate noise as effectively as the fully-glazed window. The distributed-layout method is tested on a full-sized window, where the active control system has up to 16 channels and evenly distributed across the window opening. In the test with tonal sounds, the feasibility of the active control system is demonstrated. The experimental results have validated the simulation findings for normal incidence plane waves. NRF (Natl Research Foundation, S’pore) Accepted version 2019-03-28T07:53:35Z 2019-12-06T22:04:38Z 2019-03-28T07:53:35Z 2019-12-06T22:04:38Z 2018 Journal Article Lam, B., Shi, C., Shi, D., & Gan, W.-S. (2018). Active control of sound through full-sized open windows. Building and Environment, 141, 16-27.doi:10.1016/j.buildenv.2018.05.042 0360-1323 https://hdl.handle.net/10356/106104 http://hdl.handle.net/10220/47925 http://dx.doi.org/10.1016/j.buildenv.2018.05.042 en Building and Environment © 2018 Elsevier Ltd. All rights reserved. This paper was published in Building and Environment and is made available with permission of Elsevier Ltd. 34 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Finite Element Method
DRNTU::Engineering::Electrical and electronic engineering
Active Noise Control
spellingShingle Finite Element Method
DRNTU::Engineering::Electrical and electronic engineering
Active Noise Control
Lam, Bhan
Shi, Chuang
Shi, Dongyuan
Gan, Woon-Seng
Active control of sound through full-sized open windows
description There is a pressing need to address urban sustainability challenges of increasing ambient temperatures and noise levels in densely-populated, high-rise cities. Solutions that utilise active noise control on open windows to reduce indoor noise levels seem promising, as natural ventilation is still maintained. Active noise control utilizes acoustic transducers arranged around the open window to generate a secondary incidence noise that destructively interferes with the real noise. The two most common techniques of transducer arrangement, distributed and boundary layouts, are investigated for the typical single-glazed sliding window. Finite element method is used to establish the control performance of the active noise control system and the passive attenuation provided by the sliding window. Based on the investigated fundamental limits of active control, the distributed layout has consistently yielded better performance than the boundary layout. The distributed-layout method can also reduce noise more effectively than a fully-glazed window. Moreover, sources distributed only in the partial opening of a simulated sliding window can attenuate noise as effectively as the fully-glazed window. The distributed-layout method is tested on a full-sized window, where the active control system has up to 16 channels and evenly distributed across the window opening. In the test with tonal sounds, the feasibility of the active control system is demonstrated. The experimental results have validated the simulation findings for normal incidence plane waves.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Lam, Bhan
Shi, Chuang
Shi, Dongyuan
Gan, Woon-Seng
format Article
author Lam, Bhan
Shi, Chuang
Shi, Dongyuan
Gan, Woon-Seng
author_sort Lam, Bhan
title Active control of sound through full-sized open windows
title_short Active control of sound through full-sized open windows
title_full Active control of sound through full-sized open windows
title_fullStr Active control of sound through full-sized open windows
title_full_unstemmed Active control of sound through full-sized open windows
title_sort active control of sound through full-sized open windows
publishDate 2019
url https://hdl.handle.net/10356/106104
http://hdl.handle.net/10220/47925
http://dx.doi.org/10.1016/j.buildenv.2018.05.042
_version_ 1681044952331583488