Modeling the Acoustic Response of Rough Interfaces via the Wedge AssemblageMethod. (Reannouncement with New Availability Information)

摘要

The Wedge Assemblage (WA) method for Calculating the acoustic impulse response ofrough interfaces is described and applied to sinusoidal interfaces to illustrate the accuracy of the method and, by examining the scattered field in and near the geometrical shadow region, to further explore what appears to be the methods main limitation: the exclusion of multiple scattering effects. It is found that in general multiple, scattering plays a very small role for backscattering but ran be significant in the forward direction. It it is demonstrated through numerical experimentation that geometric shadowing algorithms are essentially incompatible with wave theoretic single scatter models.... Acoustic scattering, Shallow water, Waveguide propagation.