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Determining the potentiality of masking wind turbine noise using natural ambient noise
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
2006 (English)In: Acta Acoustica united with Acustica, ISSN 1610-1928, E-ISSN 1861-9959Article in journal (Other academic) Submitted
Place, publisher, year, edition, pages
2006.
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-6587OAI: oai:DiVA.org:kth-6587DiVA: diva2:11338
Note
QS 20120316Available from: 2006-12-12 Created: 2006-12-12 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Masking of wind turbine sound by ambient noise
Open this publication in new window or tab >>Masking of wind turbine sound by ambient noise
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:nbn:se:kth:diva-4227 (URN)
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

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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  • Other style
More styles
Language
  • de-DE
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  • en-US
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  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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