Review of sound propagation in the atmosphere

Auteurs-es

  • J.E. Piercy Div. of Phys., Nat. Res. Council of Canada, Ottawa, Ont., Canada
  • T.F.W. Embleton Div. of Phys., Nat. Res. Council of Canada, Ottawa, Ont., Canada

Mots-clés :

acoustic noise, atmospheric acoustics, reviews, atmosphere, mechanisms, outdoor sound propagation, community noise problems, ground impedance, modelling, ground plane, semi-infinite porous medium, point source, atmospheric inhomogeneity, turbulence, refraction, thermal boundary layer, attenuation of barriers, interference effects, diffractive shadow zone

Résumé

On présente une synthèse des connaissances acquises durant les cinq dernières années sur les mécanismes de propagation qui sont pertinents au bruit urbain. Premièrement on discute les travaux sur l'impédance du sol et en particulier la validité du modèle qui considère celui-ci comme milieu poreux. Ensuite on résume les études théoriques sur la propagation du son d'une source ponctuelle dans une atmosphère homogène au-dessus d'un dioptre plan. Troisièmement on considère l'effet d'une atmosphère inhomogène; notamment la diffusion par la turbulence et la réfraction par un mince (~ 10 cm) gradient thermique près du sol. On traite en plus l'efficacité des écrans sonores en considérant les théories modernes de diffraction, les effets d'interférences dus aux reflections au sol et la diffusion dans l'ombrage acoustique de l'écran par la turbulence.

Fichiers supplémentaires

Publié-e

1982-01-01

Comment citer

1.
Piercy J, Embleton T. Review of sound propagation in the atmosphere. Canadian Acoustics [Internet]. 1 janv. 1982 [cité 20 févr. 2025];10(1):24-37. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/477

Numéro

Vol. 10 No. 1 (1982)

Rubrique

Articles techniques

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