ATTENUATION OF LOW-FREQUENCY SOUND IN THE NORTHEAST PACIFIC OCEAN

Authors
  1. Chow, R.K.
  2. Turner, R.G.
Corporate Authors
Defence Research Establishment Pacific, Victoria BC (CAN)
Abstract
Long-range propagation losses were measured at frequencies from 0.025 to 0.8 kHz to the north and south of a receiver at 46 degrees N, 143 degrees 30 degrees W in the Northeast Pacific. To the south of the station, the attenuation losses experienced a pronounced minimum near 50 Hz and approached the one-half Thorp value at 0.8 kHz. An examination of the behavior of the attenuation coefficient as a function of range indicated that a range of at least 700 km would be required to make meaningful measurements of attenuation in this area. To the north of the receiving station, focusing of the sound due to a rapidly shallowing sound channel prevented reliable measurement of the attenuation coefficient at any range.
Report Number
REPR-82-3 —
Date of publication
01 Jan 1982
Number of Pages
4
Reprinted from
J Acoust Soc Am, vol 72, no 3, 1982, p 888-891
DSTKIM No
83-00511
CANDIS No
38579
Format(s):
Hardcopy;Originator's fiche received by DSIS

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