Propagation-loss measurements and modelling for topographically smooth and rough seabeds / Philip R. Staal - Francine Desharnais ; approved by R. S. Walker. : D68-21/25-1989E-PDF
"Acoustic propagation loss data were obtained along two radial tracks from a receiving array at a site on the Scotian Shelf. One track was over a smooth seabed and the other over a rough seabed. The features of the propagation loss data for the two seabed types have been analyzed and compared. At-sea measurements show that fluctuations in the propagation loss data are correlated with water-depth variations for the case of the rough seabed. Two different propagation-loss modelling programs are used in an attempt to explain the acoustic features observed over the two seabeds. The majority of the modelled results were obtained with PROLOS, a DREA-developed range-dependent normal-mode program. The results of a ray-trace propagation loss model (GRASS) are also compared with the measured data. The ray-trace model provides insight on which acoustic transmission paths are most important, while PROLOS is able to model the propagation-loss over both the smooth and rough seabeds surprisingly well"--Abstract, page ii.
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| Ministère/Organisme | Defence Research Establishment Atlantic, issuing body. |
|---|---|
| Titre | Propagation-loss measurements and modelling for topographically smooth and rough seabeds / Philip R. Staal - Francine Desharnais ; approved by R. S. Walker. |
| Titre de la série | Technical memorandum ; 89/214 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Cover title. Digitized edition from print [produced by Defence Research and Development Canada]. Includes bibliographical references (pages 30-31). Includes abstracts in English and French. |
| Information sur la publication | [Dartmouth, N.S.] : National Defence, Research and Development Branch, Defence Research Establishment Atlantic, June 1989. |
| Auteur / Contributeur | Staal, Philip Ralph, author. |
| Description | 1 online resource (v, 34 pages) : graphs. |
| Numéro de catalogue |
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| Descripteurs | Underwater acoustics -- Scotian Shelf -- Measurement. Submarine topography -- Scotian Shelf. Acoustique sous-marine -- Néo-écossaise, Plateforme -- Mesure. Topographie sous-marine -- Néo-écossaise, Plateforme. |
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