Rough Surface Acoustical Scattering

date September 12, 1985
comments no comments.

Thursday, September 12, 1985 3:30 p.m.

Rick Bailey
Department of Electrical Engineering
Applied Research Laboratories
The University of Texas at Austin

This study represents an inverse problem approach to rough surface acoustical scattering, the objective being to infer certain statistical characteristics of a randomly rough surface directly from the coherently scattered pressure field. Eckart’s physical ¬≠ acoustical scattering model is applied to derive relationships for the probability density function and correlation function of surface heights which can be inferred directly from the scattered pressure field. Signal processing techniques are used to obtain estimates of the probability density function and correlation functions from experimental data. The experimental measurements are made of the steady state complex scattered pressure field from a single frequency small beam width source incident upon a pressure release model rough surface. Comparisons are made between the characteristics inferred from the scattered pressure and the actual surface characteristics.