An optimal local active noise control method based on stochastic finite element models

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dc.contributor.author Airaksinen, T.
dc.contributor.author Toivanen, J.
dc.date.accessioned 2012-11-20T09:59:57Z
dc.date.available 2012-11-20T09:59:57Z
dc.date.issued 2013 fi
dc.identifier.citation Airaksinen, 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.issn 0022-460X
dc.identifier.uri http://hdl.handle.net/123456789/40378
dc.description.abstract A 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.iso eng
dc.publisher Elsevier
dc.relation.ispartofseries Journal of Sound and Vibration
dc.rights © 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.subject.other active noise control
dc.subject.other stochastic domain
dc.subject.other Helmholtz equation
dc.subject.other finite element method
dc.subject.other passenger car
dc.subject.other Quadratic optimization
dc.subject.other Helmholtzin yhtälö
dc.subject.other meluntorjunta
dc.subject.other melunvaimennus
dc.title An optimal local active noise control method based on stochastic finite element models
dc.type Article en
dc.identifier.urn URN:NBN:fi:jyu-201211203036
dc.subject.kota 113
dc.subject.kota 114
dc.subject.kota 111
dc.contributor.laitos Tietotekniikan laitos fi
dc.contributor.laitos Department of Mathematical Information Technology en
dc.type.uri http://purl.org/eprint/type/SubmittedJournalArticle
dc.identifier.doi 10.1016/j.jsv.2013.08.016
dc.description.version Post-print
eprint.status http://purl.org/eprint/type/status/PeerReviewed
jyx.note Previous title (pre-print version): An optimal feed-forward local active noise control method based on stochastic finite element models

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