Modelling long-range, low frequency acoustic fish detection in the Bay of Fundy and Georges Bank

PDF

Authors
  1. Pecknold, S.P.
  2. Osler, J.C.
  3. Ellis, D.D.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Abstract
The propagation of a 1 kHz acoustic signal is modeled for the environments of the eastern Georges Bank and the central Bay of Fundy areas. Sound speed profiles are taken from mean monthly temperature and salinity climatological data, and used with range-dependent bathymetry and sediment types to calculate expected propagation losses out to a 40 km range in each environment for each season. Reverberation levels were also calculated for the environments to provide a model of active signal excess for fish schools. The model results indicated that detection ranges for typical fish schools could be up to 15 km for the Bay of Fundy and 40 km for Georges Bank with existing source and receiver transducers, and that both environments should be reverberation limited for signal levels down to about 190 dB in fair weather.

Il y a un résumé en français ici.

Report Number
DRDC-ATLANTIC-TM-2007-282 — Technical Memorandum
Date of publication
01 Jan 2008
Number of Pages
40
DSTKIM No
CA032106
CANDIS No
531139
Format(s):
CD ROM

Permanent link

Document 1 of 1

Date modified: