Sökning: (WFRF:(Botteldooren Dick)) srt2:(2010-2014)
> (2014) >
A model of sound sc...
A model of sound scattering by atmospheric turbulence for use in noise mapping calculations
-
- Forssén, Jens (författare)
- Chalmers Tekniska Högskola
-
- Hornikx, Maarten (författare)
- Eindhoven University of Technology
-
- Botteldooren, Dick (författare)
- Ghent University
-
visa fler...
-
- Wei, Weigang (författare)
- Ghent University
-
- Van Renterghem, Timothy (författare)
- Ghent University
-
- Ögren, Mikael (författare)
- Statens väg- och transportforskningsinstitut,Miljö och trafikanalys, MTA
-
visa färre...
-
(creator_code:org_t)
- S. Hirzel Verlag, 2014
- 2014
- Engelska.
-
Ingår i: Acta Acoustica united with Acustica. - : S. Hirzel Verlag. - 1610-1928 .- 1861-9959. ; 100:5, s. 810-815
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.3...
-
visa färre...
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Nyckelord
- Noise
- Distribution (gen)
- Atmosphere
- Decrease
- Calculation
- Ucc Physics
- Ucc Physics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas