Effect of the ground surface and meteorological conditions on the active control of a monopole noise source

Auteurs-es

  • Ann Nakashima Dept. of Mechanical Engineering, Sch. of Occup. and Environ. Hygiene, The University of British Columbia, 3rd Floor, 2206 East Mall, Vancouver, BC V6T 1Z3, Canada
  • Murray Hodgson Dept. of Mechanical Engineering, Sch. of Occup. and Environ. Hygiene, The University of British Columbia, 3rd Floor, 2206 East Mall, Vancouver, BC V6T 1Z3, Canada

Mots-clés :

Acoustic fields, Acoustic noise, Acoustic wave refraction, Aircraft propellers, Attenuation, Control systems, Earth atmosphere, Green's function, Thermal gradients, Wind effects, Green function parabolic equation method, Monopole noise source, Temperature inversion, Wind speed

Résumé

Atmospheric refraction and soft ground have a significant effect on the performance of a single-channel active noise control (ANC) system. However, under such conditions the noise levels near the ground were significantly attenuated due to the upward refraction of sound waves. It would be more important to concentrate on attenuating the noise under temperature inversion and downwind conditions.

Fichiers supplémentaires

Publié-e

2003-09-01

Comment citer

1.
Nakashima A, Hodgson M. Effect of the ground surface and meteorological conditions on the active control of a monopole noise source. Canadian Acoustics [Internet]. 1 sept. 2003 [cité 10 mai 2026];31(3):88-9. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1564

Numéro

Vol. 31 No. 3 (2003)

Rubrique

Actes du congrès de la Semaine canadienne d'acoustique

Licence

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