Journal
SIGNAL PROCESSING
Volume 190, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.sigpro.2021.108317
Keywords
Active noise control; Convolutional neural network; Deep learning; Machine listening; Hearables
Categories
Funding
- Singapore Ministry of National Development
- National Research Foundation under the Cities of Tomorrow RD Program [COT-V4-2019-1]
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Fixed-filter strategy is crucial in active noise control, but it cannot achieve optimal noise reduction for different noise types. A selective fixed-filter ANC method based on 2D CNN is proposed to derive the most suitable control filter for different noise types, reducing classification complexity.
Active noise control (ANC) technology is increasingly ubiquitous in wearable audio devices, or hearables. Owing to its low computational complexity, high robustness, and exemplary performance in dealing with dynamic noise, the fixed-coefficient control filter strategy plays a central role in portable ANC implementation. Unlike its traditional adaptive counterpart, the fixed-filter strategy is unable to attain optimal noise reduction for different types of noise. Hence, we propose a selective fixed-filter ANC method based on a simplified two-dimensional convolution neural network (2D CNN), which is implemented on a coprocessor (e.g., in a mobile phone), to derive the most suitable control filter for different noise types. To further reduce classification complexity, we designed a lightweight one-dimensional CNN (1D CNN), which can directly classify noise types in time domain. A numerical simulation based on measured paths in headphones demonstrates the proposed algorithm's efficacy in attenuating real-world non-stationary noise over conventional adaptive algorithms. (c) 2021 Elsevier B.V. All rights reserved.
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