Horizontal refraction and acoustic signals fluctuations caused by internal waves packets in shallow water

The subject of the paper is to consider the propagation of low frequency sound field in shallow water in presence of soliton-like internal waves (SLLW). It is supposed that shallow water parameters are closed lo ones of acoustic trace in Yellow Sea. We assume as well that SLIW spread across stationary acoustic trace. The problem of sound propagation is considered within the framework of 3-D model of the shallow water. The theory of "horizontal rays and vertical modes" is applied to take into account influence of horizontal refraction due to SLIW. As shown in the paper SLIW lead periodically to "focusing" and "defocusing" of the horizontal rays. The estimations of the sound fluctuations due to SLIW demonstrates that value of fluctuations can reach up to 10-20 dB (between moments of the "focusing" and "defocusing"). The results presented in the paper can be used as basis of remote sensing of the internal waves packets in shallow water.