Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/146090
Title: Active control of broadband sound through the open aperture of a full-sized domestic window
Authors: Lam, Bhan
Shi, Dongyuan
Gan, Woon-Seng
Elliott, Stephen J.
Nishimura, Masaharu
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: 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
Project: COT-V4-2019-1
Journal: Scientific Reports 
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.
URI: https://hdl.handle.net/10356/146090
ISSN: 2045-2322
DOI: 10.1038/s41598-020-66563-z
Rights: © 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/.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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