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Numerical simulations of the sound propagation in non rectilinear streets
Billon, Alexis; Picaut, Judicaël; Valeau, Vincent et al.
2009Euronoise
 

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Keywords :
Urban acoustics; Propagation; Diffusion model
Abstract :
[en] At high frequencies, the sound propagation can be approximated by the propagation of sound particles which are reflected and absorbed at the boundaries. This propagation follows then a transport process. In urban canyons, this transport process can be reduced to a diffusion process. The resultant model allows one to obtain the spatial distribution of the acoustical energy in a street in a few seconds using a classical finite elements program. This diffusion model has been previously validated in rectilinear streets for different geometrical and acoustical parameters. In this paper, more complex geometries such as varying cross-sections, bents and streets crossings are dealt with. As the diffusion model only models the reverberated sound field, diffraction effects on the direct sound field at streets corners are added. The obtained results are then compared to scale model experiments.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Billon, Alexis ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Electroacoustique, acoustique appliquée et éclairage
Picaut, Judicaël
Valeau, Vincent
Sakout, Anas
Language :
English
Title :
Numerical simulations of the sound propagation in non rectilinear streets
Publication date :
October 2009
Number of pages :
7
Event name :
Euronoise
Event place :
Edinburgh, United Kingdom
Event date :
26-28 octobre
Audience :
International
Name of the research project :
OPALHA
Funders :
ADEME - Agence de l'Environnement et de la Maîtrise de l'Energie [FR]
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