Change search
CiteExportLink to record
Permanent link

Direct link
Cite
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
Masking of wind turbine sound by ambient noise
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
2006 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

The main objective of this work was to gain an increasing understanding of the properties of vegetation noise and also to the relative ratios of different natural ambient noises to mask wind turbine sound.

A discrete vegetation noise model was developed and compared to an earlier model showing improved estimations, especially at frequencies below 0.5 kHz. Field measurements of sound from deleafed trees are compared to a deleafed tree model with satisfactory agreement. A wind turbulence model (Sandia method) was coupled to the discrete model and thereby time series of fluctuating vegetation noise can be computed. Several measurements including higher wind speeds than reported in earlier literature were compared to predictions of fluctuating vegetation noise with good agreement.

Psycho acoustic tests was performed by 36 subjects to determine the signal-to-noise (S/N) ratios when wind turbine noise is inaudible in three different natural ambient noises. The masking threshold varied between -6.5 dBA and -2.7 dBA for coniferous tree noise and sea wave noise respectively. Further tests revealed that at S/N ratios of +3dBA and above the wind turbine noise was considered as the dominant sound source.

Place, publisher, year, edition, pages
Stockholm: KTH , 2006. , 9. p.
Series
Trita-AVE, ISSN 1651-7660 ; 2006:86
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-4227OAI: oai:DiVA.org:kth-4227DiVA: diva2:11339
Presentation
2006-12-14, Sal 74 MWL, KTH, Teknikringen 8, Stockholm, 13:15
Opponent
Supervisors
Note
QC 20101109Available from: 2006-12-12 Created: 2006-12-12 Last updated: 2010-11-09Bibliographically approved
List of papers
1. Prediction method for vegetation noise
Open this publication in new window or tab >>Prediction method for vegetation noise
(English)Manuscript (Other academic)
National Category
Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:kth:diva-6585 (URN)
Note
QC 20101109Available from: 2006-12-12 Created: 2006-12-12 Last updated: 2010-11-09Bibliographically approved
2. Influence of turbulence and wind speed profiles on vegetation noise
Open this publication in new window or tab >>Influence of turbulence and wind speed profiles on vegetation noise
(English)Manuscript (Other academic)
National Category
Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:kth:diva-6586 (URN)
Note
QC 20101109Available from: 2006-12-12 Created: 2006-12-12 Last updated: 2010-11-09Bibliographically approved
3. Determining the potentiality of masking wind turbine noise using natural ambient noise
Open this publication in new window or tab >>Determining the potentiality of masking wind turbine noise using natural ambient noise
2006 (English)In: Acta Acoustica united with Acustica, ISSN 1610-1928Article in journal (Other academic) Submitted
National Category
Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:kth:diva-6587 (URN)
Note
QS 20120316Available from: 2006-12-12 Created: 2006-12-12 Last updated: 2012-03-16Bibliographically approved

Open Access in DiVA

fulltext(1059 kB)1525 downloads
File information
File name FULLTEXT01.pdfFile size 1059 kBChecksum MD5
24034fa293a2fccd68d186f6f0699c6da52e95333863a8753d1409f92f58ed169092997a
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Bolin, Karl
By organisation
Aeronautical and Vehicle Engineering
Fluid Mechanics and Acoustics

Search outside of DiVA

GoogleGoogle Scholar
Total: 1525 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: 1057 hits
CiteExportLink to record
Permanent link

Direct link
Cite
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