Low-frequency, bottom-interacting pulse propagation in range-dependent oceans

Author

Collins, Michael D.

Author_Institution

US Naval Ocean Res. & Dev. Activity, Stennis Space Center, MS, USA

Volume

13

Issue

4

fYear

1988

fDate

10/1/1988 12:00:00 AM

Firstpage

222

Lastpage

228

Abstract

An asymptotic-numerical model for low-frequency, bottom-interfacing pulse propagation in the ocean is derived. This model, referred to as the progressive wave equation (PWE), works in the time domain using an approach analogous to the parabolic equation method that is commonly used in the frequency domain. The mode handles depth and range variations in the speed of sound, density, and attenuation. The attenuation is assumed to depend linearly on frequency in the sediment. A numerical solution for the PWE was derived, and the accuracy of the asymptotics, numerics, and starting field was demonstrated with a benchmark

Keywords

acoustic wave propagation; underwater sound; acoustics; asymptotic-numerical model; attenuation; bottom-interacting pulse propagation; density; depth; low-frequency; numerical solution; parabolic equation method; progressive wave equation; range; range-dependent oceans; sediment; speed of sound; time domain; Acoustic propagation; Attenuation; Frequency domain analysis; Nonlinear equations; Oceans; Partial differential equations; Robustness; Sediments; Time domain analysis; Underwater acoustics;

fLanguage

English

Journal_Title

Oceanic Engineering, IEEE Journal of

Publisher

ieee

ISSN

0364-9059

Type

jour

DOI

10.1109/48.9234

Filename

9234