Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/149977
Title: A hybrid approach to active and passive noise control for open windows
Authors: Murao, Tatsuya
Nishimura, Masaharu
Gan, Woon-Seng
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2019
Source: Murao, T., Nishimura, M. & Gan, W. (2019). A hybrid approach to active and passive noise control for open windows. Applied Acoustics, 155, 338-345. https://dx.doi.org/10.1016/j.apacoust.2019.05.028
Project: L2NICCFP1-2013-7
Journal: Applied Acoustics
Abstract: This research focuses on the use of an open window with an active noise control (ANC) system and a splitter silencer to improve the attenuation level of broadband noise. We previously introduced a similar idea with a splitter silencer and a loudspeaker inside a duct. However, it is challenging to achieve noise reduction with a splitter silencer in a short duct. In our previous research, we achieved noise reduction at an open window with an array of ANC units, in which a reference microphone with a loudspeaker is collocated. However, this system had limited high-frequency noise reduction due to the distance between each loudspeaker. Here, we improved noise reduction by integrating a collocated ANC system and a splitter silencer, which has an open ratio of 50%. Each unit has a reference microphone at the front and a loudspeaker at the back, which generate anti-noise. Four units are combined in an array with a splitter silencer. In an experiment, we implemented two splitter silencers in an eight-channel ANC system at an open window (24 × 48 × 12 cm). The results show that the splitter silencers attenuated high-frequency noise above 2 kHz. Moreover, the ANC system achieved an attenuation of 2 to 10 dB for noise in the range of 200 Hz to 2 kHz. Overall, we were able to achieve a total attenuation of 2 to 17 dB above 200 Hz.
URI: https://hdl.handle.net/10356/149977
ISSN: 0003-682X
DOI: 10.1016/j.apacoust.2019.05.028
Rights: © 2019 Elsevier Ltd. All rights reserved. This paper was published in Applied Acoustics and is made available with permission of Elsevier Ltd.
Fulltext Permission: embargo_20211208
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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