FRAM II Single Channel Ambient Noise Statistics: A Paper Presented at the 101st Meeting of the Acoustical Society of America, 19 May 1981, Ottawa, Canada.

This document describes the results of a statistical analysis study of FRAM II arctic under-ice ambient noise data. The specific data that were analyzed were recorded on 23-24 April 1980 from a pack ice camp in the Arctic Ocean, located at 86 deg N latitude, 25 deg W longitude. At this location, the...

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Bibliographic Details
Main Author: Dwyer,Roger F
Other Authors: NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT NEW LONDON LAB
Format: Text
Language:English
Published: 1981
Subjects:
Snow
Ice and Permafrost
Acoustics
*AMBIENT NOISE
*UNDERWATER ACOUSTICS
*PACK ICE
FREQUENCY
TENSILE STRESS
STATISTICAL ANALYSIS
IMPULSE NOISE
FRICTION
SPECTRUM ANALYSIS
TIME DOMAIN
ACOUSTIC DATA
COLLISIONS
DEEP OCEANS
ARCTIC OCEAN
UNDERICE
Non-Gaussian noise
Shorefast ice
Ice dynamics
LPN-NUSC-A-750- 30
PE61152N
Arctic
Arctic Ocean
Canada
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA108755
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA108755
Description
Summary:This document describes the results of a statistical analysis study of FRAM II arctic under-ice ambient noise data. The specific data that were analyzed were recorded on 23-24 April 1980 from a pack ice camp in the Arctic Ocean, located at 86 deg N latitude, 25 deg W longitude. At this location, the bottom depth was approximately 4000 m. The measurement system consisted of a broadband omnidirectional hydrophone, suspended to a depth of 91 m from a sonobuoy located in a lead. Under the influence of arctic currents, the pack ice was slowly moving. This movement caused rifting and cracking of ice, which occurred, at times, throughout the experiments and represented a structured acoustic noise source. Both impulsive and burst noise were identified in the data and were probably created by tensile cracks and rubbing ice masses.

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