A Review of some Physical and Chemical Factors Affecting the Attenuation of Low Frequency Sound in Seawater,

Abstract

An attempt has been made to trace the contributions of various physical and chemical factors which effect the low frequency attenuation of sound observed in deep ocean channels and to establish that chemical relaxational processes do in fact contribute to the overall attenuation of this sound. The available evidence indicates that below 0.5 kHz, attenuation is affected predominantly by diffraction and diffusive scattering, but in the range 0.5 to 2.5 kHz, it is the effects of chemical relaxation processes, involving boric acid/borate and magnesium/carbonate equilibria, which dominate the sound absorption phenomenon.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1980
Accession Number
ADA097196

Entities

People

  • Daniel J. Whelan

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption
  • Acoustic Propagation
  • Acoustic Properties
  • Acoustics
  • Aqueous Solutions
  • Boric Acids
  • Chemical Elements
  • Chemistry
  • Deep Oceans
  • Diffraction
  • Frequency
  • Marine Chemistry
  • Oceanography
  • Oceans
  • Physics Laboratories
  • Scattering
  • Sea Water

Readers

  • Acoustical Oceanography.
  • Materials Science and Engineering.
  • Theoretical Analysis.