Title
A comparison of perturbation theory and the small-slope approximation for acoustic scattering from a rough interface for a Biot medium
Document Type
Article
Department or Administrative Unit
Engineering Technologies, Safety, and Construction
Publication Date
7-3-2002
Abstract
In this paper, the lowest order small-slope approximation (SSA) scattering cross section for Biot theory is derived. Numerical results are obtained for both backscattering and bistatic scattering using a modified power law spectrum, and these results are compared with those of lowest order perturbation theory (PT). Frequencies ranging from 100 Hz to 3 kHz are used for surfaces with RMS heights h of 0.1 and 1 m and a correlation length l of 10 m. The angle of incidence for the bistatic results is limited to 45/spl deg/. It is found that for the smaller surface height roughness (h = 0.1 m), the SSA and PT give the same results for frequencies up to almost 1 kHz for both backscattering and bistatic scattering. For h = 1 m, the SSA and PT backscatter results are in good agreement at all frequencies for incident grazing angles up to approximately 45/spl deg/. For the bistatic results, the SSA and PT results agree only at low grazing angles of scatter. In the specular region, the results differ significantly.
Recommended Citation
Taiqian Yang, Broschat, S. L., & Galea, C. (2002). A comparison of perturbation theory and the small-slope approximation for acoustic scattering from a rough interface for a Biot medium. IEEE Journal of Oceanic Engineering, 27(3), 403–412. https://doi.org/10.1109/joe.2002.1040927
Journal
IEEE Journal of Oceanic Engineering
Rights
© 2002 IEEE
Comments
This article was originally published in IEEE Journal of Oceanic Engineering. The full-text article from the publisher can be found here.
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