Näytä suppeat kuvailutiedot

dc.contributor.authorAiraksinen, T.
dc.contributor.authorToivanen, J.
dc.date.accessioned2012-11-20T09:59:57Z
dc.date.available2012-11-20T09:59:57Z
dc.date.issued2013fi
dc.identifier.citationAiraksinen, T. & Toivanen, J. (2013). An optimal local active noise control method based on stochastic finite element models. Journal of Sound and Vibration, 332 (2013) pp.6924-6933. doi:10.1016/j.jsv.2013.08.016
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/40378
dc.description.abstractA new method is presented to obtain a local active noise control that is optimal in stochastic environment. The method uses numerical acoustical modeling that is performed in the frequency domain by using a sequence of finite element discretizations of the Helmholtz equation. The stochasticity of domain geometry and primary noise source is considered. Reference signals from an array of microphones are mapped to secondary loudspeakers, by an off-line optimized linear mapping. The frequency dependent linear mapping is optimized to minimize the expected value of error in a quiet zone, which is approximated by the numerical model and can be interpreted as a stochastic virtual microphone. A least squares formulation leads to a quadratic optimization problem. The presented active noise control method gives robust and efficient noise attenuation, which is demonstrated by a numerical study in a passenger car cabin. The numerical results demonstrate that a significant, stable local noise attenuation of 20–32 dB can be obtained at lower frequencies (< 500 Hz) by two microphones, and 8–36 dB attenuation at frequencies up to 1000 Hz, when 8 microphones are used.fi
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofseriesJournal of Sound and Vibration
dc.subject.otheractive noise control
dc.subject.otherstochastic domain
dc.subject.otherHelmholtz equation
dc.subject.otherfinite element method
dc.subject.otherpassenger car
dc.subject.otherQuadratic optimization
dc.subject.otherHelmholtzin yhtälö
dc.subject.othermeluntorjunta
dc.subject.othermelunvaimennus
dc.titleAn optimal local active noise control method based on stochastic finite element models
dc.typeArticle
dc.identifier.urnURN:NBN:fi:jyu-201211203036
dc.contributor.laitosTietotekniikan laitosfi
dc.contributor.laitosDepartment of Mathematical Information Technologyen
dc.type.urihttp://purl.org/eprint/type/SubmittedJournalArticle
dc.identifier.doi10.1016/j.jsv.2013.08.016
jyx.notePrevious title (pre-print version): An optimal feed-forward local active noise control method based on stochastic finite element models
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.relation.issn0022-460X
dc.type.versionacceptedVersion
dc.rights.copyright© 2013 Elsevier Ltd. This is a post-print version of a paper published in Journal of Sound and Vibration 332 (2013) pp. 6924-6933 by Elsevier.
dc.rights.accesslevelopenAccessfi


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