Multi-domain active sound control and noise shielding

H. Lim, S. V. Utyuzhnikov, Y. W. Lam, A. Turan

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)717-725
Number of pages9
JournalJournal of the Acoustical Society of America
Issue number2
Publication statusPublished - Feb 2011
Externally publishedYes


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