Journal article
Ray theory versus the parabolic equation in a long-range ducted environment
The Journal of the Acoustical Society of America, Vol.78(1), pp.176-189
01/01/1985
DOI: 10.1121/1.392555
Abstract
In this paper we examine the effects as predicted by extended ray theory of a deep water SOFAR channel with a superimposed surface duct (depths from 200–800 m) on acoustic propagation for a nominal frequency of 300 Hz. Several source and receiver configurations (combinations with one or both in and out of the duct) are considered. Validity is tested by comparison of the ray‐theoretic calculations with results based on the parabolic equation (PE). Both model predictions of transmission loss and acoustic field patterns agree very well. In addition, we examine the effects of two strongly refracting analytic sound‐speed profiles. We find that the PE approach does not accurately locate the range of signal turning points. Subsequently we introduce a new and simple sound‐speed transformation to improve those predictions.
Details
- Title: Subtitle
- Ray theory versus the parabolic equation in a long-range ducted environment
- Creators
- A Tolstoy - United States Naval Research LaboratoryD. H Berman - United States Naval Research LaboratoryE. R Franchi - United States Naval Research Laboratory
- Resource Type
- Journal article
- Publication Details
- The Journal of the Acoustical Society of America, Vol.78(1), pp.176-189
- Publisher
- Acoustical Society of America
- DOI
- 10.1121/1.392555
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Language
- English
- Date published
- 01/01/1985
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984627340602771
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