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.

Abstract

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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Document Details

Document Type
Technical Report
Publication Date
Nov 25, 1981
Accession Number
ADA108755

Entities

People

  • Roger F. Dwyer

Organizations

  • Naval Underwater Systems Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Ambient Noise
  • Bandwidth
  • Data Analysis
  • Detection
  • Distribution Functions
  • Frequency
  • Frequency Bands
  • Frequency Domain
  • Gaussian Distributions
  • Gaussian Noise
  • Gaussian Processes
  • Information Science
  • Measurement
  • Power Spectra
  • Statistical Analysis
  • Statistics
  • Time Domain

Readers

  • Acoustical Oceanography.
  • Oceanography.
  • Polar and Arctic Studies