Abstract
The diffraction characteristics of sonar baffles are investigated with a simple, two-dimensional model consisting of a single-frequency plane wave incident on an opaque baffle. The configuration of the baffle is taken to be an arc of a circle. The diffracted field of the baffle is computed on a cylindrical surface (transducer) located behind the baffle as with typical baffle-transducer installations. It is assumed that the surface on the forward side of the baffle is rigid and that the rear surface, or surface toward the transducer, is a pressure-release surface. Results for the diffracted field are obtained for varying baffle width, baffle-transducer separation, and radius of curvature of the baffle. The results indicate that for fixed baffle width and baffle-transducer separation, usually prescribed by the dimensions of the sonar dome, considerable reduction in the acoustic field incident on the transducer is obtained through the use of minimum radius of curvature for the baffle.
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