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A model of sound scattering by atmospheric turbulence for use in noise mapping calculations
Chalmers Tekniska Högskola.
Eindhoven University of Technology.
Ghent University.
Ghent University.
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2014 (English)In: Acta Acoustica united with Acustica, ISSN 1610-1928, E-ISSN 1861-9959, Vol. 100, no 5, 810-815 p.Article in journal (Refereed) Published
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Text
Abstract [en]

Sound scattering due to atmospheric turbulence limits the noise reduction in shielded areas. An engineering model is presented, aimed to predict the scattered level for general noise mapping purposes including sound propagation between urban canyons. Energy based single scattering for homogeneous and isotropic turbulence following the Kolmogorov model is assumed as a starting point and a saturation based on the von Kármán model is used as a first-order multiple scattering approximation. For a single shielding obstacle the scattering model is used to calculate a large dataset as function of the effective height of the shielding obstacle and its distances to source and receiver. A parameterisation of the dataset is used when calculating the influence of single or double canyons, including standardised air attenuation rates as well as façade absorption and Fresnel weighting of the multiple façade reflections. Assuming a single point source, an aver aging over three receiver positions and that each ground reflection causes energy doubling, the final engineering model is formulated as a scattered level for a shielding building without canyon plus a correction term for the effect of a single or a double canyon, assuming a flat rooftop of the shielding building. Input parameters are, in addition to geometry and sound frequency, the strengths of velocity and temperature turbulence.

Place, publisher, year, edition, pages
S. Hirzel Verlag , 2014. Vol. 100, no 5, 810-815 p.
Keyword [en]
Noise, Distribution (gen), Atmosphere, Decrease, Calculation
National Category
Fluid Mechanics and Acoustics
Research subject
SAB, Ucc Physics
Identifiers
URN: urn:nbn:se:vti:diva-9381DOI: 10.3813/AAA.918760ISI: 000340346700003Scopus ID: 2-s2.0-84907060527OAI: oai:DiVA.org:vti-9381DiVA: diva2:912435
Available from: 2016-03-16 Created: 2016-03-02 Last updated: 2016-03-17Bibliographically approved

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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