Accession Number : AD0785447

Title :   Modified Ray Theory for Discontinuous Media.

Descriptive Note : Technical rept.,

Corporate Author : WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS

Personal Author(s) : Davis,James A.

Report Date : JUN 1974

Pagination or Media Count : 133

Abstract : The modified ray theory which arises from use of the generalized WKB procedure based on Airy functions is investigated for inhomogeneous media having discontinuous properties. The modifications to ordinary ray theory which result are most significant for ordinary rays having angles in the vicinity of grazing or split-ray angles, angles of intromission, and critical angles. Properties of this frequency dependent theory are examined analytically and numerically for simple problems in underwater sound propagation corresponding to (1) a discontinuous sound velocity gradient somewhere within the water column, and (2) a homogeneous ocean bottom interfaced with an inhomogeneous water column. (Modified author abstract)

Descriptors :   *Underwater sound, *Sound transmission, *Ray tracing, Differential equations, Numerical analysis

Subject Categories : Physical and Dynamic Oceanography
      Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE