Numéro
J. Phys. IV France
Volume 02, Numéro C1, Avril 1992
Deuxième Congrès Français d'Acoustique / Second French Conference on Acoustics
Page(s) C1-1091 - C1-1093
DOI http://dx.doi.org/10.1051/jp4:19921240
Deuxième Congrès Français d'Acoustique / Second French Conference on Acoustics

J. Phys. IV France 02 (1992) C1-1091-C1-1093

DOI: 10.1051/jp4:19921240

DIFFUSION ACOUSTIQUE PAR UN TUBE FERMÉ PAR DEUX COQUES HÉMISPHÉRIQUES

D. DÉCULTOT, F. LECROQ, G. MAZE and J. RIPOCHE

Laboratoire d'Acoustique Ultrasonore et d'Électronique, URA CNRS 1373, Université du Havre, Place Robert Schuman, F-76610 Le Havre, France


Abstract
The acoustic scattering from infinite cylinders or spheres has shown the high influence of the surface wave propagation. We distinguish two types of surface waves: the Rayleigh or Whispering gallery waves and the Scholte-Stoneley waves. In this paper we present experimental results obtained from finite cylindrical shells bounded by two hemispherical endcaps. In our study, the insonification is in a parallel direction with the main axis of objects. We explain these experimental results by writting the stationary condition in the meridian plane of these objects, and by computing the phase velocity in the spherical shell and in the length of cylindrical shell.



© EDP Sciences 1992