High Frequency Propagation Loss and Reverberation in Bedford Basin

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Authors
  1. Vasiliev, B.
  2. Collier, A.J.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Abstract
This report compares the propagation loss and reverberation measurements collected in the Bedford Basin, Halifax, in February and March 2004 with the predictions of the acoustic models CASS-GRAB and GSM-MULTIP. The agreement between the measurements and model outputs is satisfactory if the APL-UW models for surface and bottom characteristics are used. The propagation loss and reverberation are shown to be affected by the range-dependent bathymetry and bottom composition of the Basin. Reverberation measurements suggest that in the Basin the surface backscatter saturates at lower wind speeds than predicted by the APL-UW models. Further work is needed to verify this tentative observation and its implication on the density of the wind-generated sub-surface bubble layer.

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Report Number
DRDC-ATLANTIC-TM-2007-249 — Technical Memorandum
Date of publication
01 Oct 2007
Number of Pages
58
DSTKIM No
CA031391
CANDIS No
530266
Format(s):
CD ROM

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