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Sound Source Characterisation and Transfer Path Analysis with Time Histories
Luleå tekniska universitet.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik.ORCID-id: 0000-0003-2955-2776
2003 (Engelska)Ingår i: International Journal of Acoustics and Vibration, ISSN 1027-5851, Vol. 8, nr 3, s. 167-175Artikel i tidskrift (Refereegranskat) 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 esti- mation 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 experi- ment, 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 cal- culated time histories are audible but not pronounced.

Ort, förlag, år, upplaga, sidor
International Institute of Acoustics and Vibration (IIAV) , 2003. Vol. 8, nr 3, s. 167-175
Nationell ämneskategori
Strömningsmekanik och akustik
Forskningsämne
Teknisk akustik
Identifikatorer
URN: urn:nbn:se:ltu:diva-76689DOI: 10.20855/ijav.2003.8.3142OAI: oai:DiVA.org:ltu-76689DiVA, id: diva2:1369916
Tillgänglig från: 2019-11-13 Skapad: 2019-11-13 Senast uppdaterad: 2019-11-13Bibliografiskt granskad

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Johansson, Örjan

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