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A model of sound scattering by atmospheric turbulence for use in noise mapping calculations

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Abstract
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 Karman 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 facade absorption and Fresnel weighting of the multiple facade 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.
Keywords
REDUCTION, DIFFRACTION, BARRIER, SCREEN, PROPAGATION, PARABOLIC EQUATION METHOD

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Citation

Please use this url to cite or link to this publication:

MLA
Forssén, Jens et al. “A Model of Sound Scattering by Atmospheric Turbulence for Use in Noise Mapping Calculations.” ACTA ACUSTICA UNITED WITH ACUSTICA 100.5 (2014): 810–815. Print.
APA
Forssén, J., Hornikx, M., Botteldooren, D., Wei, W., Van Renterghem, T., & Ögren, M. (2014). A model of sound scattering by atmospheric turbulence for use in noise mapping calculations. ACTA ACUSTICA UNITED WITH ACUSTICA, 100(5), 810–815.
Chicago author-date
Forssén, Jens, Maarten Hornikx, Dick Botteldooren, Weigang Wei, Timothy Van Renterghem, and Mikael Ögren. 2014. “A Model of Sound Scattering by Atmospheric Turbulence for Use in Noise Mapping Calculations.” Acta Acustica United with Acustica 100 (5): 810–815.
Chicago author-date (all authors)
Forssén, Jens, Maarten Hornikx, Dick Botteldooren, Weigang Wei, Timothy Van Renterghem, and Mikael Ögren. 2014. “A Model of Sound Scattering by Atmospheric Turbulence for Use in Noise Mapping Calculations.” Acta Acustica United with Acustica 100 (5): 810–815.
Vancouver
1.
Forssén J, Hornikx M, Botteldooren D, Wei W, Van Renterghem T, Ögren M. A model of sound scattering by atmospheric turbulence for use in noise mapping calculations. ACTA ACUSTICA UNITED WITH ACUSTICA. 2014;100(5):810–5.
IEEE
[1]
J. Forssén, M. Hornikx, D. Botteldooren, W. Wei, T. Van Renterghem, and M. Ögren, “A model of sound scattering by atmospheric turbulence for use in noise mapping calculations,” ACTA ACUSTICA UNITED WITH ACUSTICA, vol. 100, no. 5, pp. 810–815, 2014.
@article{5720384,
  abstract     = {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 Karman 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 facade absorption and Fresnel weighting of the multiple facade 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.},
  author       = {Forssén, Jens and Hornikx, Maarten and Botteldooren, Dick and Wei, Weigang and Van Renterghem, Timothy and Ögren, Mikael},
  issn         = {1610-1928},
  journal      = {ACTA ACUSTICA UNITED WITH ACUSTICA},
  keywords     = {REDUCTION,DIFFRACTION,BARRIER,SCREEN,PROPAGATION,PARABOLIC EQUATION METHOD},
  language     = {eng},
  number       = {5},
  pages        = {810--815},
  title        = {A model of sound scattering by atmospheric turbulence for use in noise mapping calculations},
  url          = {http://dx.doi.org/10.3813/AAA.918760},
  volume       = {100},
  year         = {2014},
}

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