Journal article
A multibounce, single-scatter ray theoretic model
The Journal of the Acoustical Society of America, Vol.80(2), pp.622-632
08/01/1986
DOI: 10.1121/1.394057
Abstract
This study describes theoretical predictions for deep‐water bistatic reverberation from a bossed surface (with boss depth a) overlying an upwardly refracting, linear, sound‐speed environment. The major result of this work is that over a large range of ka (wavenumber k, 0.1≤ka≤10) the strongest scattered field is produced by the rough surface directly above the submerged source and above the receiver. Our model considers both the azimuthal and vertical redistribution of scattered energy caused by randomly distributed hard or soft bosses situated on a hard or soft boundary. The model allows one nonspecular surface scattering per path (connecting the source with the receiver) coupled with any number of specular interactions (bounces), each of which suffers losses due to scattering into nonspecular directions, i.e., consistent with conservation of energy. The propagation model is based on ray theory while the scattering model uses Twersky’s scattering cross section for hard or soft planar surfaces roughened by hard or soft, hemispherical bosses, and we note when such differences become important. The model calculates intensity at a point as a function of distance and direction from the scattering region. This paper represents a first step toward development of an under‐ice reverberation model.
Details
- Title: Subtitle
- A multibounce, single-scatter ray theoretic model
- Creators
- A Tolstoy - United States Naval Research LaboratoryD. H Berman - United States Naval Research LaboratoryE. B Wright - United States Naval Research LaboratoryR. N Baer - United States Naval Research Laboratory
- Resource Type
- Journal article
- Publication Details
- The Journal of the Acoustical Society of America, Vol.80(2), pp.622-632
- Publisher
- Acoustical Society of America
- DOI
- 10.1121/1.394057
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Language
- English
- Date published
- 08/01/1986
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984627192802771
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