Accession Number : AD0683721

Title :   SCATTERING BY COATED PROLATE SPHEROIDS.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA UNIV LOS ANGELES DEPT OF ENGINEERING

Personal Author(s) : Yeh,C.

Report Date : JAN 1969

Pagination or Media Count : 25

Abstract : The exact solution of the diffraction of plane sound waves by a rigid prolate spheroid coated with a confocal sheath of penetrable acoustic material is obtained. Results are given in terms of spheroidal functions. Detailed numerical computations for the radiation patterns of the scattered wave are carried out for certain acoustic parameters. It is found that the coating alters quite significantly the scattering characteristics of an incident wave. Furthermore, because of the coupling between each expansion coefficient for the scattered wave with all expansion coefficients for the incident wave for the coated spheroid case, the Watson transformation technique cannot be used directly to yield expressions which are applicable at high frequencies. (Author)

Descriptors :   (*ACOUSTICS, SCATTERING), SPHERES, COATINGS, MECHANICAL WAVES, ACOUSTIC PROPERTIES, PROPAGATION

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE