IDENTIFICATION OF A LAYERED BOTTOM IN A SHALLOW SEA FROM SPACE-FREQUENCY DEPENDENCIES OF LOSSES

The effect of the bottom structure and acoustical characteristics on t he space-frequency dependences of losses is analyzed. The relation of optimal propagation frequencies (at which sound transmission losses ar e a minimum) with the characteristics of a layered bottom in a shallow sea is studied. A method far refining the layered seafloor characteri stics using space-frequency dependence of losses near the optimal freq uency is suggested. The seafloor characteristics are reconstructed fro m an experimental space-frequency dependence of losses with the use of geographical data about seafloor structure.