LOW FREQUENCY ACOUSTIC PROPAGATION OVER ROUGH SURFACES

Authors
  1. Purcell, A.J.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Purcell (Anthony) Consultants, Lunenburg NS (CAN)
Abstract
The boss theory of Biot is used to study low frequency acoustic propagation over pebbled surfaces. Unlike the standard stochastic approach to rough surface scattering. Biot's theory is applicable to high slope roughness, such as found in areas of glacial till. The rough surface generates a boundary wave, whose amplitude falls off as the square root of the range from a spherical sources. Because of interference effects between the boundary wave and the reflected source. Because of interference effects between the boundary wave and the reflected wave, the total field can undergo large oscillations with frequency.
Report Number
DREA-CR-89-441 — Contractor Report
Date of publication
15 Dec 1989
Number of Pages
43
DSTKIM No
90-02004
CANDIS No
64269
Format(s):
Hardcopy;Originator's fiche received by DSIS

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