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Appl. Sci. 2016, 6(5), 124; doi:10.3390/app6050124

Blockwise Frequency Domain Active Noise Controller Over Distributed Networks

Institute of Telecommunication and Multimedia Applications, Universitat Politecnica de Valencia, Camino de Vera s/n; 46022 Valencia, Spain
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Academic Editor: Vesa Valimaki
Received: 2 March 2016 / Accepted: 20 April 2016 / Published: 28 April 2016
(This article belongs to the Special Issue Audio Signal Processing)
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Abstract

This work presents a practical active noise control system composed of distributed and collaborative acoustic nodes. To this end, experimental tests have been carried out in a listening room with acoustic nodes equipped with loudspeakers and microphones. The communication among the nodes is simulated by software. We have considered a distributed algorithm based on the Filtered-x Least Mean Square (FxLMS) method that introduces collaboration between nodes following an incremental strategy. For improving the processing efficiency in practical scenarios where data acquisition systems work by blocks of samples, the frequency-domain partitioned block technique has been used. Implementation aspects such as computational complexity, processing time of the network and convergence of the algorithm have been analyzed. Experimental results show that, without constraints in the network communications, the proposed distributed algorithm achieves the same performance as the centralized version. The performance of the proposed algorithm over a network with a given communication delay is also included. View Full-Text
Keywords: active noise control; distributed networks; acoustic sensor networks; filtered-x least mean square active noise control; distributed networks; acoustic sensor networks; filtered-x least mean square
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Antoñanzas, C.; Ferrer, M.; de Diego, M.; Gonzalez, A. Blockwise Frequency Domain Active Noise Controller Over Distributed Networks. Appl. Sci. 2016, 6, 124.

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