STUDYING THE POSSIBILITY OF DIFFRACTIONAL FOCUSING OF THE SOUND FIELD IN SHALLOW WATER
The propagation of acoustic waves in a shallow water is considered. The possibility of diffraction focusing of sound during the propagation of several normal modes is studied. The phenomenon of diffraction focusing is modeled for two analytically developed waveguide models - a waveguide with a bottom in the form of an absorbing half-space and with an transitional layer on the underlying half-space. It is shown that the main obstacle to diffraction focusing is the strong dependence of the mode amplitudes on the acoustic characteristics of the layered bottom.