Experimental and Theoretical Studies of the Seismo-Acoustic Noise Field at Very Low Frequencies.

Abstract

While the first ambient-noise spectra were published in 19481 it was the growing interest in passive sonar systems in the 1960's that stimulated research into this aspect of underwater acoustics. The first published results relating to low-frequency ambient noise appeared in a paper by Wenz2, describing data in the range 50 Hz to 10 kHz. The noise sources reported included turbulence, wave motion, earthquakes, biological activity and shipping. Other contributions appearing in that period deal with wind and wave-generated noise3-5, underwater volcanism6,7 and relevant to this report a large rise in noise levels at frequencies below 4 Hz 81,9

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1995
Accession Number
ADA360099

Entities

People

  • A. C. Kibblewhite
  • Chia-Yi Wu

Organizations

  • University of Auckland

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Waves
  • Acoustics
  • Deep Water
  • Difference Frequency
  • Dispersion Relations
  • Doppler Effect
  • Equations
  • Frequency
  • Human Factors Engineering
  • Ocean Waves
  • Reflection
  • Shallow Water
  • Standing Waves
  • Surface Properties
  • Underwater Acoustics
  • Water
  • Waves

Readers

  • Acoustics.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Technical Research and Report Writing.