Abstract

The concept of surface impedance is used to investigate theoretically the reflection of sound from a nonuniform boundary whose irregularities possess a periodic variation. The method used is similar to that of Lysanov [J. Acoustics USSR 4, 47 (1958)]. By supposing the impedance to be a certain function of the angle of incidence, the results may be applied to determine the sound reflected from a sinusoidal interface between two propagating media. Numerical results are presented to indicate the dependence of the reflected radiation upon the form of the impedance variation, the angle of incidence, and the wavelength of the sound.

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