WIT Press


Sediment Interface And Volume Reverberation Modeling With The Parabolic Approximation

Price

Free (open access)

Paper DOI

10.2495/AC030271

Volume

69

Pages

20

Published

2003

Size

862.21 kb

Author(s)

K. B. Smith, L.-S. Li, B.-C. Lee, & H. Kao

Abstract

Sediment interface and volume reverberation modeling with the parabolic approximation K. B. Smith, L.-S. Li, B.-C. Lee, & H. Kao Department of Physics Naval Postgraduate School, USA Abstract A reverberation model based on the parabolic approximation has been developed that includes sediment interface and volume perturbations. A multiple fonvardlsingle backscatter approximation is made, and the structure of the solution is found to depend on the two-way propagation with a scattering strength scaling dependent on the local properties of the perturbation. The model has been implemented for continuous wave (CW) signals to predict mean reverberation pressure levels and for broadband pulse signals to generate complex reverberation structures in the time-domain. The spatial (vertical) correlation of these predicted signals is then analyzed in an attempt to extract information on the underlying characteristics of the perturbation. Preliminary analysis suggests that reverberation due to the volume pert

Keywords