Abstract
Acoustic monostatic and bistatic scattering from the edge of a solid wedge immersed in water is analyzed further, always assuming a line source parallel to the edge of a wedge. Our previous work on the subject is extended by emphasizing the dependence of the scattering amplitude on the wedge material, which may be uniform or layered, and which can be characterized by surface impedance. Impedance values are obtained for multiple layers by the method of Brekhovskihk. Our numerical analysis is based upon Macdonald functions [A. Erdelyi, Higher Transcendental Functions (McGraw–Hill, New York, 1953)] via an integral representation that we were able to render convergent. The scattering amplitude is integral bilinear in the Macdonald functions and dependent upon the wedge impedance, and has been evaluated numerically. [Work supported by NAVSEA.]
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