FREQUENCY SCALE ESTIMATIONS OF A SOUND FIELD INTERFERENCE STRUCTURE IN A SHALLOW SEA

The perturbation theory for rays was used to compute the variability o f frequency periods in the interference structure caused by slow chang es in wave channel parameters in the horizontal plane. The efficiency of the proposed technique has been demonstrated with frequency bandwid th estimations of intensity oscillations in low-depth, bottom oceanic waveguides. It is shown that the phase methods based on the measuremen t of the frequency variability scales can be used for the detection of large-scale inhomogeneities in a shallow sea.