Numéro
J. Phys. IV France
Volume 02, Numéro C1, Avril 1992
Deuxième Congrès Français d'Acoustique / Second French Conference on Acoustics
Page(s) C1-749 - C1-752
DOI http://dx.doi.org/10.1051/jp4:19921163
Deuxième Congrès Français d'Acoustique / Second French Conference on Acoustics

J. Phys. IV France 02 (1992) C1-749-C1-752

DOI: 10.1051/jp4:19921163

ABSORPTION D'UNE ONDE ACOUSTIQUE PAR LES PAROIS D'UN GUIDE 2D

V. MARTIN and P. VIGNASSA

Institut Méditerranéen de Technologie, IMT, Technopôle de Château-Gombert, F-13451 Marseille cedex 13, France


Abstract
At very low frequencies, the acoustic wave propagating in a duct with yielding walls can present three types of behavior : subsonic, attenuated or supersonic. The second zone where attenuation occurs is shown to depend on the mass of the walls and on the size of the cross section of the duct, while the amplitude of the wave in the supersonic zone is influenced by the rigidity of the structure. The control of the effects of the parameters could lead to industrial applications.



© EDP Sciences 1992