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On impedance measurements for samples with non-linear acoustic properties
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Flow acoustics.ORCID iD: 0000-0002-8474-8563
2008 (English)In: 14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference), Vancouver, BC, 2008Conference paper, Published paper (Refereed)
Abstract [en]

This paper discusses techniques for obtaining the acoustic properties of in-duct samples with non-linear acoustic characteristics such as perforates and other facing sheets used in aircraft engine liners and automotive mufflers. It is assumed that the non-linearity occurs locally at constrictions or sharp corners. The paper starts with a short review of previous impedance tube measurements made for determining the acoustic impedance of non-linear samples. Multi-port techniques using sinusoidal excitation for better characterization of samples with non-linear properties are developed and experimentally tested.

Place, publisher, year, edition, pages
Vancouver, BC, 2008.
Series
14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference)
Keyword [en]
Impedance measurement, Impedance tubes, Multi-port, Non-linear, Non-linear acoustics, Non-Linearity, Nonlinear properties, Sharp corners, Sinusoidal excitations, Aeroacoustics, Aircraft engines, Automobile mufflers, Paper sheeting, Acoustic impedance
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-61818Scopus ID: 2-s2.0-78249247464ISBN: 9781563479397 (print)OAI: oai:DiVA.org:kth-61818DiVA: diva2:479707
Conference
14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference), Vancouver, BC, 5 May 2008 through 7 May 2008
Note
QC 20120221Available from: 2012-01-18 Created: 2012-01-18 Last updated: 2012-02-21Bibliographically approved

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Bodén, Hans

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf