Accession Number : AD0861190

Title :   Where is the Split-Beam Shadow.

Descriptive Note : Technical rept.,

Corporate Author : WOODS HOLE OCEANOGRAPHIC INSTITUTION MA

Personal Author(s) : Murphy, E. L.

Report Date : SEP 1969

Pagination or Media Count : 16

Abstract : In a stratified medium having a maximum in sound velocity giving rise to a split-beam shadow, velocity profiles of bilinear form and ray theory have been used to estimate the range to the shadow boundary. However, for velocity profile representations with smooth maxima (first and second derivatives continuous), which may be more natural, the range to the shadow boundary predicted by ray theory is infinite. The infinity arises from a failure of ray theory in the neighborhood of turning points on the rays. (Author)

Descriptors :   *SOUND TRANSMISSION), (*UNDERWATER SOUND, VELOCITY, DIFFRACTION, CORRECTIONS, PROPAGATION.

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE