SOUND PROPAGATION OVER DICKINS SEAMOUNT IN THE NORTHEAST PACIFIC OCEAN

Authors
  1. Ebbeson, G.R.
  2. Turner, R.G.
Corporate Authors
Defence Research Establishment Pacific, Victoria BC (CAN)
Abstract
The acoustic propagation losses between a 230-Hz cw source and a multi-hydrophone receiving system were measured over Dickins Seamount in the Northeast Pacific. The source was towed at depths of 18 and 184 m. The receiving system had hydrophones spaced in depth from 323 to 633 m. The measurements were made to a maximum range of 130 km with the receiver located at a range of 60 km from the seamount peak. The results show that the seamount cast an acoustic shadow over the receiver, increasing the propagation loss by up to 15 dB, when the source was shallow and in a position which enabled the seamount to intercept all of the deep refracted source energy.
Date of publication
01 Jan 1983
Number of Pages
10
Reprinted from
J Acoust Soc Am, vol 73, no 1, 1983, p 143-152
DSTKIM No
83-02944
CANDIS No
40616
Format(s):
Hardcopy;Originator's fiche received by DSIS

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