Propagation of sound from water into a sloping fast bottom

When sound is propagated from large distances toward the apex of a fluid wedge overlying a fluid bottom in which the speed of sound is greater, acoustical energy must be transmitted into the bottom as the various normal modes in the wedge are cut off. (Alternatively, we can say that the rays of sound, because of the continual increase in their grazing angles of incidence on the wedge‐bottom interface resulting from successive reflections between the wedge surfaces, will eventually obtain angles of incidence greater than critical, at which time they will begin to be refracted into the bottom; this simple view is qualitative only.) In our approach we use the method of images to calculate the distribution of pressure and its phase at the interface, and then treat the interface as a distribution of sources and calculate the field radiated into the bottom by the Green's function integral. Both calculations require a high‐speed digital computer. Preliminary results and comparisons with experiments will be discu...