Azimuthal Ambiguity Due to Multipath Propagation in a Horizontally StratifiedUnderwater Acoustical Environment

摘要

The purpose of this report is to demonstrate some effects of multipathpropagation in a horizontally stratified medium. It is hoped that this report will throw light on an essential distinction between deep and shallow water sound propagation and also a limitation to the use of one dimensional horizontal acoustical arrays in shallow water. These arrays may be of an unlimited variety: bottom mounted, towed behind a surface vessel or mounted in the nose of a torpedo. For reasons of formality, clarification of assumptions and completeness, a mathematical derivation is included. For those readers who do not want to be bothered with these details, a nonmathematical discussion of the results including examples is included.