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In-duct source characterization for multiple sources
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Flow acoustics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-8474-8563
2009 (English)In: 16th International Congress on Sound and Vibration 2009, ICSV 2009, 2009, 2664-2671 p.Conference paper (Refereed)
Abstract [en]

This paper discusses experimental techniques for detecting if there are multiple sources in a duct and obtaining the acoustic characteristics of these sources. Experimental techniques for in-duct source characterization under plane wave conditions in ducts, when we know the location of the source, are well established. In some cases there can however be sources at both ends of a duct. The paper starts with discussing the possibility to, by using a number of flush mounted microphones in the duct, detect sources located on both sides of the test section and to extract the acoustic source characteristics of the sources. First the sound field in a duct with sources at both ends is discussed and described. The theory for experimental determination of source data is then described. A discussion of the consequences of source correlation is included. The methods are first tested using loudspeakers in a duct.

Place, publisher, year, edition, pages
2009. 2664-2671 p.
Keyword [en]
Source Characterisation, Multiple sources, duct acoustics, Sound fields, Acoustic fields, Aeroacoustics
National Category
Engineering and Technology Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-62221ScopusID: 2-s2.0-84871433321ISBN: 978-161567736-8OAI: diva2:479982
ICSV16, 16th International Congress on Sound and Vibration. Kraków, Poland. 5-9 July, 2009

QC 20120502

Available from: 2012-01-18 Created: 2012-01-18 Last updated: 2014-11-14Bibliographically approved

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