Acoustic source identification in an enclosed space using the inverse phased beam tracing at medium frequencies

Jeong-Guon Ih (Invited author), Cheol-Ho Jeong (Invited author)

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Abstract

When the source is enclosed by room surfaces, it is not easy, though not totally impossible, to apply conventional modal methods for source identification. This is because there are too many complicated wave interferences and effects of wall impedance, in particular at medium frequencies. The phased beam tracing method was suggested as a fast and efficient acoustic simulation tool at the medium frequencies in an enclosure, which overcomes the defects of geometrical acoustics techniques. In this study, the phased beam tracing method, implemented in its inverse form, was applied to the identification of the acoustic sources inside a chamber. In the simulation tests, spherical and rectangular shaped sources operating in a room were taken as examples. When the source pressure distribution was reconstructed by this numerical inverse technique, the sound power spectrum radiated from the source could be estimated by eliminating the contribution from surface reflections. Reconstruction error was investigated by the Monte Carlo simulation in terms of the signal-to-noise ratio
Original languageEnglish
Title of host publicationProceedings of The Journal of the Acoustical Society of America
Number of pages3309
Volume123 Pt 2
PublisherAcoustical Society of America
Publication date2008
DOIs
Publication statusPublished - 2008
EventAcoustics'08 - Paris, France
Duration: 29 Jun 20084 Jul 2008
http://webistem.com/acoustics2008/acoustics2008/cd1/data/index.html

Conference

ConferenceAcoustics'08
Country/TerritoryFrance
CityParis
Period29/06/200804/07/2008
Internet address

Bibliographical note

Copyright (2008) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.

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