BISTATIC ACOUSTIC SCATTERING AT THE SEABED

Authors
  1. Purcell, A.J.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Purcell (Anthony) Consultants, Lunenburg NS (CAN)
Abstract
The phenomenon of surface reverberation may be quantified through the concept of the surface scattering strength, a measure of the ability of a rough surface to incoherently scatter acoustic signals. Recently, Ellis and Haller (JASA Suppl.1 82, S124, 1987) have proposed an empirical model for the surface scattering strength for use in bistatic reverberation calculations; namely a sum of a Lambert's law term for grazing angles far from the specular direction and an expression based on Kirchhoff's approximation for near specular directions. This report is an attempt to place this composite model on a rigorous foundation by examining the separate components of the model. It is found that the model of Ellis and Haller is consistent with scattering from a surface with two distinct scales of roughness. TRUNCATED
Report Number
DREA-CR-92-412 — Contractor Report
Date of publication
15 Feb 1992
Number of Pages
67
DSTKIM No
92-01494
CANDIS No
104384
Format(s):
Hardcopy;Originator's fiche received by DSIS

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