Abstract
This paper covers both theoretical and experimental phases of the subject of scattering of a plane wave incident on infinite semicylindrical bosses of random radii with periodic spacing. The probability density function of the radius of a semicylinder is assumed to be uniform, and the spacing between the centers of adjacent bosses is maintained constant. The spacing is so selected as to make the shadow effects negligible for the angles of incidence considered in this paper. The scalar form of the Helmholtz integral formulation was employed, although some of the inherent assumptions are invalid, owing to discontinuities in the surface. A comparison of the lobe structure (scintillation) of the experimental and theoretical angular acoustic-intensity scatter patterns, in particular, the main specular lobe, shows a reasonable agreement with the additional inference about the weakness of the assumption of the model material being rigid.
Published Version
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