The principle underlying the wireless reference microphone enhancing noise reduction performance in multi-channel active noise control windows

Multi-channel active noise control (ANC) is widely applied as a practical approach to achieving a large noise cancellation area. However, the efficacy of the multi-channel ANC is significantly impacted by the quality of the reference signal in practice. Hence, we propose using wireless reference mic...

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Bibliographic Details
Published in:Mechanical systems and signal processing 2024-04, Vol.212, p.111284, Article 111284
Main Authors: Shen, Xiaoyi, Ji, Junwei, Shi, Dongyuan, Luo, Zhengding, Gan, Woon-Seng
Format: Article
Language:English
Subjects:
Active noise control (ANC)
Multi-channel ANC window
Reference signal-to-interference ratio (RSIR)
Wireless microphone
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Summary:Multi-channel active noise control (ANC) is widely applied as a practical approach to achieving a large noise cancellation area. However, the efficacy of the multi-channel ANC is significantly impacted by the quality of the reference signal in practice. Hence, we propose using wireless reference microphones in the multi-channel ANC, which substantially improves the reference signal quality and increases the noise reduction performance. Reference signal-to-interference ratio (RSIR) is brought for analysis to understand how the wireless multi-channel ANC system works. According to the theoretical derivation, the multi-channel adjoint least mean square (LMS) algorithm benefits from the higher RSIR that the wireless reference microphone brings about regarding steady-state performance. Furthermore, the numerical simulation and real-time experiments on a multi-channel ANC window in a resident room confirm these theoretical analyses.
ISSN:0888-3270
1096-1216
DOI:10.1016/j.ymssp.2024.111284