Diffraction Around Finite Planar Baffles.

The diffraction of sound around the edge of a half plane is considered in order to gain some insight into the effect of positioning sonar arrays on or near finite baffles. Some useful approximations are derived and demonstrated for the pressure levels due to a single source at endfire and also directly behind both soft and hard baffles. Comparisons are made with the assumption of an infinite baffle and the usual approximation for dealing with an array on a finite hard baffle is questioned. Author