Multi-domain active sound control and noise shielding

Lim, H; Utyuzhnikov, SV; Lam, YW; Turan, A

Abstract

This paper describes an active sound control methodology based on difference potentials. The main feature of this methodology is its ability to automatically preserve “wanted” sound within a domain while canceling “unwanted” noise from outside the domain. This method of preservation of the wanted sounds by active shielding control is demonstrated with various broadband and realistic sound sources such as human voice and music in multiple domains in a one-dimensional enclosure. Unlike many other conventional active control methods, the proposed approach does not require the explicit characterization of the wanted sound to be preserved. The controls are designed based on the measurements of the total field on the boundaries of the shielded domain only, which is allowed to be multiply connected. The method is tested in a variety of experimental cases. The typical attenuation of the unwanted noise is found to be about 20 dB over a large area of the shielded domain and the original wanted sound field is preserved with errors of around 1 dB and below through a broad frequency range up to 1 kHz.

© 2011 Acoustical Society of America

Citation

Lim, H., Utyuzhnikov, S., Lam, Y., & Turan, A. (2011). Multi-domain active sound control and noise shielding. ˜The œJournal of the Acoustical Society of America (Online), 129(2), 717-725. https://doi.org/10.1121/1.3531933

• Journal Article Type: Article
• Publication Date: Feb 1, 2011
• Deposit Date: Oct 7, 2011
• Publicly Available Date: Apr 5, 2016
• Journal: The Journal of the Acoustical Society of America (JASA)
• Print ISSN: 0001-4966
• Peer Reviewed: Peer Reviewed
• Volume: 129
• Issue: 2
• Pages: 717-725
• DOI: https://doi.org/10.1121/1.3531933
• Publisher URL: http://dx.doi.org/10.1121/1.3531933
• Related Public URLs: http://asadl.org/jasa/resource/1/jasman/v129/i2/p717_s1
• Additional Information: Funders : Engineering and Physical Sciences Research Council (EPSRC)