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Determination of non-linear acoustic properties of perforates using single tone excitation
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Flow acoustics.ORCID iD: 0000-0002-8474-8563
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
2010 (English)In: 17th International Congress on Sound and Vibration (ICSV17), 2010Conference paper (Other academic)
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 accessible from both side such as perforates or other material used as top sheets in aircraft engine liners and automotive mufflers. New 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
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
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-61854ScopusID: 2-s2.0-84871415894OAI: diva2:479783
17th International Congress on Sound and Vibration, Cairo, Egypt, 2010-07-18 - 2010-07-22

QC 20120424

Available from: 2012-01-18 Created: 2012-01-18 Last updated: 2014-11-17Bibliographically approved

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