Active Noise Control over Space: A Subspace Method for Performance Analysis
Date
2019-03-15
Authors
Zhang, Jihui (Aimee)
Abhayapala, Thushara
Zhang, Wen
Samarasinghe, Prasanga
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MDPI
Abstract
In this paper, we investigate the maximum active noise control performance over a three-dimensional (3-D) spatial space, for a given set of secondary sources in a particular environment. We first formulate the spatial active noise control (ANC) problem in a 3-D room. Then we discuss a wave-domain least squares method by matching the secondary noise field to the primary noise field in the wave domain. Furthermore, we extract the subspace from wave-domain coefficients of the secondary paths and propose a subspace method by matching the secondary noise field to the projection of primary noise field in the subspace. Simulation results demonstrate the effectiveness of the proposed algorithms by comparison between the wave-domain least squares method and the subspace method, more specifically the energy of the loudspeaker driving signals, noise reduction inside the region, and residual noise field outside the region. We also investigate the ANC performance under different loudspeaker configurations and noise source positions
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Keywords
active noise control (ANC), performance analysis, wave domain, spatial noise, reverberant room
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Applied Sciences
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Journal article
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Open Access
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This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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