Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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
Prediction of interior noise of a small aircraft
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Structural and vibroacoustics.ORCID iD: 0000-0002-9632-8398
2013 (English)In: 20th International Congress on Sound and Vibration 2013, ICSV 2013: Volume 1, 2013, Bangkok, Thailand: The International Institute of Acoustics and Vibration (IIAV) , 2013, 411-418 p.Conference paper, Published paper (Refereed)
Abstract [en]

The aim was to determine, already at the design stage, the interior noise level in a new small aircraft. The noise predictions were based on full-scale measurements on an existing model. A number of models for the prediction of velocity levels of a fuselage excited by turbulent boundary layers are discussed. Predicted results are compared to the result of in-flight measurements. It is found that the Corcos model gives the best agreement with the measured results. It is found that the velocity level of the plate elements of the fuselage very much depends on the speed of the aircraft. An increase of the speed by 10 % increases the plate velocity level by 3 dB. The velocity level is also strongly dependent on the plate thickness. An increase of the thickness by 50 % will decrease the velocity level by 5 dB. Small variations of other parameters like width and height and curvature of plate have only a very marginal effect on the plate velocity in the frequency range of interest. However, the acoustic power radiated into the aircraft cabin depends on the plate velocity of the fuselage as well the sound radiation properties of the plate structure. In the frequency, range of importance for the A-weighted noise level in the cabin the sound radiation ratio is increased as the plate thickness is increased. The noise level in the cabin is thus reduced much less than the velocity level of the fuselage by increasing the plate thickness. An increase of the width and length of plate elements reduces the sound intensity radiated by a plate. A combination of increased width and length and thickness of plate can result in a reduced noise radiation from the fuselage and thus in a reduced interior noise level.

Place, publisher, year, edition, pages
Bangkok, Thailand: The International Institute of Acoustics and Vibration (IIAV) , 2013. 411-418 p.
Keyword [en]
Acoustic generators, Acoustic noise, Acoustic noise measurement, Acoustic properties, Acoustic wave propagation, Acoustic wave scattering, Cabins (aircraft), Velocity
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-136776Scopus ID: 2-s2.0-84897107182OAI: oai:DiVA.org:kth-136776DiVA: diva2:677146
Conference
20th International Congress on Sound and Vibration 2013, ICSV 2013; Bangkok; Thailand; 7 July 2013 through 11 July 2013
Note

QC 20140102

Available from: 2013-12-09 Created: 2013-12-09 Last updated: 2014-06-26Bibliographically approved

Open Access in DiVA

fulltext(3699 kB)336 downloads
File information
File name FULLTEXT01.pdfFile size 3699 kBChecksum SHA-512
f66af82e8375b85f09c1e231f7e1562c083e36fa861c1c51b201e49f82633a296c31bdc93d8fc2aabdf4167ea6a50a72268699ee8436265a5dea5b5aeb2c06a7
Type fulltextMimetype application/pdf

Other links

ScopusICSV20

Authority records BETA

Feng, Leping

Search in DiVA

By author/editor
Feng, Leping
By organisation
MWL Structural and vibroacoustics
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 336 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 91 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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