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Single tone excitation techniques for determination of non-linear acoustic properties of perforates
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Flow acoustics.ORCID iD: 0000-0002-8474-8563
2010 (English)In: Proceedings of the International Conference on Noise and Vibration Engineering, ISMA 2010, 2010, 597-609 p.Conference paper, Published paper (Refereed)
Abstract [en]

This paper discusses experimental techniques for obtaining the acoustic properties of in-duct samples with non-linear acoustic characteristics. The methods developed are intended for studies of non-linear energy transfer to higher harmonics for samples such as perforates or other material used as top sheets in aircraft engine liners and automotive mufflers. New single sided and double sided multi-port techniques, using sinusoidal excitation, for characterisation of samples with non-linear properties are developed and experimentally tested.  The results of the preliminary experimental tests show that these new techniques can give results which are useful for understanding non-linear energy transfer to higher harmonics.

Place, publisher, year, edition, pages
2010. 597-609 p.
Keyword [en]
Characterisation, Multi-port, Non-linear, Non-linear acoustics, Non-Linearity, Nonlinear properties, Sharp corners, Sinusoidal excitations, Sound fields, Acoustic fields, Acoustic properties, Aircraft engines, Automobile mufflers, Energy transfer, Aeroacoustics
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-61850ISI: 000302905400049Scopus ID: 2-s2.0-84951086641ISBN: 978-90-73802-87-2 (print)OAI: oai:DiVA.org:kth-61850DiVA: diva2:479778
Conference
ISMA 2010, International Conference on Noise and Vibration Engineering, Leuven, Belgium, 20 - 22 September 2010
Note
QC 20120419Available from: 2012-01-18 Created: 2012-01-18 Last updated: 2012-08-23Bibliographically approved

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Bodén, Hans

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