Collection and Preliminary Analysis of Under-Ice Ambient Noise Data, Cape North, January to April, 1971.

Ambient noise data was collected from bottom-mounted hydrophones in 65 fms of water near Cape North, Nova Scotia, from January to April 1971. Preliminary analyses indicate that generalizations made from data collected at other sites can be used in only the broadest sense to predict noise levels at C...

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Bibliographic Details
Main Author: Oake,Austen Martin
Other Authors: NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
Format: Text
Language:English
Published: 1971
Subjects:
Snow
Ice and Permafrost
Acoustics
*UNDERWATER SOUND
SEA ICE
NOVA SCOTIA
NOISE
MEASUREMENT
WEATHER
WAVE EQUATIONS
HYDROPHONES
DATA PROCESSING EQUIPMENT
THESES
Cape North
Ice
ice pack
permafrost
Sea ice
Online Access:http://www.dtic.mil/docs/citations/AD0733177
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0733177
Description
Summary:Ambient noise data was collected from bottom-mounted hydrophones in 65 fms of water near Cape North, Nova Scotia, from January to April 1971. Preliminary analyses indicate that generalizations made from data collected at other sites can be used in only the broadest sense to predict noise levels at Cape North. The open water spectral shapes resemble deep water spectral shapes proposed by Wenz (1962) rather than shallow water spectra found by Piggott (1964) at another location on the Scotian Shelf. Under-ice noise levels are below open water levels in the frequency range 40 Hz to 2 kHz, but above this frequency, mechanical noise sources within the ice pack elevate levels above those found under open water conditions.

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