The Diffraction of Sound Stationary and Non- Stationary Ideal and Elastic Bodies Placed Near the Interface of Media in an Underwater Sound Channel and in a Planar Waveguide

In the series of problems on the study of the influence of media interfaces on the characteristics of
sound scattering by various bodies, the following variants are usually investigated:
a) The interaction of a scatterer with a single interface between media;
b) The scatterer in the field of interacting modes of the underwater sound channel; and
c) The finding of the total scattered field of the system of real and imaginary sources and
scatterers of the planar waveguide.