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Sound source characterisation and transfer path analysis with time histories
Luleå tekniska universitet.
2003 (English)In: International Journal for Transformative Research, ISSN 1027-5851, E-ISSN 2360-7866, Vol. 8, no 3, p. 167-175Article in journal (Refereed) Published
Abstract [en]

The article describes a method to separate time histories of partial sound sources. The goal is to develop a noise control engineering tool for use in sound quality improvement applications. Contributions from partial sound sources are identified. The partial sound sources may be ranked for the purpose of creating a better mixture of sound in selected listening positions. The strategy is to reproduce time histories of sources of importance. The method described includes experimental and calculation parts. The experimental part consists of the recording of sound pressure time signals, reciprocal measurement of frequency response functions, and source strength estimation of partial sound sources. The calculation part comprises calculation of the cross-spectral matrix of source strength, calculation of filters, and filtered sound pressure recording to obtain time signals of the individual sources. Usually the contribution from partial sources is impossible to record directly. In this laboratory experiment, such control was possible. The laboratory experiment shows that the method described makes it possible to produce informative separation of time histories of partial sound sources. The effects of the errors in the calculated time histories are audible but not pronounced

Place, publisher, year, edition, pages
2003. Vol. 8, no 3, p. 167-175
National Category
Fluid Mechanics and Acoustics
Research subject
Engineering Acoustics
Identifiers
URN: urn:nbn:se:ltu:diva-8086Local ID: 6871e8f0-eeb1-11dc-a549-000ea68e967bOAI: oai:DiVA.org:ltu-8086DiVA, id: diva2:980976
Note
Validerad; 2003; 20080310 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Johansson, Örjan

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