Mathematical modeling of high frequency sound fields in layered moving medium

O. A. Godin, D. Yu. Mikhin, S. Ya. Molchanov

Abstract

An efficient computer code is developed to simulate high-frequency acoustic fields in stratified moving media. The program is based on explicit quadrature expressions for eikonal, pressure amplitude at a ray and ray trajectory. The ray solution is improved by account of diffraction effect in vicinity of caustics. The code is applied to study the shift of convergence zone boundaries induced by currents as well as differences in transmission loss and acoustic travel times in reciprocal transmissions. The environmental conditions are chosen to resemble those in the Gulf Stream. A simple experiment is proposed to observe loss of acoustic reciprocity due to strong oceanic currents.


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