TEMPERATURE-AND WIND-DEPENDENT AMBIENT NOISE UNDER MIDWINTER PACK ICE

Authors
  1. Ganton, J.H.
  2. Milne, A.R.
Corporate Authors
Pacific Naval Lab, Esquimalt BC (CAN)
Abstract
Measurements of ambient noise under shorefast pack ice during winter revealed two distinct noise-producing mechanisms. One mechanism was the production of tensile cracks at the surface of the sea ice by thermal stresses caused by decreasing air temperatures. The resulting ice-cracking sounds produced impulsive noise. The second was the interaction of the granular ice surface with the wind, which produced Gaussian noise. Separate pressure spectra are presented for underwater noise generated by each mechanism. The spectra and the statistical properties of the underwater noise appeared to be realted to the local metheorology and the temperature changes within the ice cover.
Report Number
PNL-RP-65-8 — Reprint
Date of publication
30 Sep 1965
Number of Pages
8
Reprinted from
J of the Acoustical Society of America, vol 38, no 3, 1965, p 406-411
DSTKIM No
66-03382
CANDIS No
140422
Format(s):
Hardcopy;Originator's fiche received by DSIS

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