Limits of noise control over space

Thushara D. Abhayapala, Jihui Zhang, Prasanga Samarasinghe, Wen Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

This paper investigates the best possible performance of noise cancellation over a region of space for a fixed set of secondary sources within a given acoustic environment. We first formulate the spatial active noise control (ANC) problem in a 3-D acoustic enclosure (room). Secondly, we derive a wave-domain least square method by matching the secondary sound field to the primary noise field in wave domain. Thirdly, we propose a subspace method by matching the secondary field coefficients to the projection of primary noise field in the subspace. Simulation results compare between the wave-domain least square method and the subspace method, in terms of energy of the loudspeaker driving signals, noise reduction inside the region, and residual noise field outside the region. The subspace matching method provides the limits of the ANC system for the given constraints and the acoustic characteristics of the room.

Original languageEnglish
Title of host publicationProceedings of the 23rd International Congress on Acoustics
Subtitle of host publicationIntegrating 4th EAA Euroregio 2019
EditorsMartin Ochmann, Vorlander Michael, Janina Fels
PublisherInternational Commission for Acoustics (ICA)
Pages47-54
Number of pages8
ISBN (Electronic)9783939296157
DOIs
StatePublished - 2019
Event23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019 - Aachen, Germany
Duration: 9 Sep 201923 Sep 2019

Publication series

NameProceedings of the International Congress on Acoustics
Volume2019-September
ISSN (Print)2226-7808
ISSN (Electronic)2415-1599

Conference

Conference23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019
Country/TerritoryGermany
CityAachen
Period9/09/1923/09/19

Keywords

  • Insulation
  • Sound
  • Transmission

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