Biot–Tolstoy–Medwin diffraction model

The Biot–Tolstoy–Medwin (BTM) diffraction model is a mathematical framework used to describe the sound propagation in underwater acoustics, particularly in shallow water environments. The model incorporates aspects of both geometrical and wave diffraction theories to analyze how sound waves interact with both the ocean surface and the seabed, as well as the boundaries of the water column. ### Key Features of the BTM Model 1.