Propagation Loss Modelling on the Scotian Shelf: Comparison of Model Predictions with Measurements
Propagation loss data using explosive sources have been obtained over a 180 km track on the Scotian Shelf during both summer and winter conditions. The water depth varies between 55 and 75 meters over a sandy bottom. A sub-bottom model is discussed in the accompanying paper, “Propagation Loss Modelling on the Scotian Shelf: The Geo-acoustic Model”. In the present paper the bottom properties determined from the geo-acoustic model are used as part of the input to the DREA range-dependent normal mode program. The predictions from the normal mode calculations are compared with the summer and winter propagation loss measurements for a number of ranges, depths and frequencies. The difference between the calculations and measurements can be used to refine the geo-acoustic model.
KeywordsAttenuation Coefficient Sound Speed Propagation Loss Summer Data Bottom Roughness
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- 1.D.M.F. Chapman and D.D. Ellis, “Propagation-loss modelling on the Scotian Shelf: The geo-acoustic model”, elsewhere in the proceedings.Google Scholar
- 2.Huntec (70) Ltd., 25 Howden Road, Scarborough, Ontario, Canada MIR 5A6.Google Scholar
- 3.N. Cochrane, Memorial University of Newfoundland, informal communication.Google Scholar
- 4.D.D. Ellis and B.A. Leverman, Defence Research Establishment Atlantic, informal communication.Google Scholar
- 7.R.D. Stoll, “Acoustic waves in saturated sediments”, in: Physics of Sound in Marine Sediments, Loyd Hampton, ed., Plenum Press, New York (1974).Google Scholar
- 8.D.J. Dodds, Huntec (’70) Ltd., informal communication.Google Scholar