J. Phys. IV France 02 (1992) C1-1091-C1-1093
DIFFUSION ACOUSTIQUE PAR UN TUBE FERMÉ PAR DEUX COQUES HÉMISPHÉRIQUESD. 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
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