Approaches to a Quantitative Analytical Description of Low Frequency Sound Absorption in Sea Water,

Abstract

The absorption of sound in sea water at low frequency (1-100 kHz) and intermediate frequency (50-500 kHz) ranges can be defined by a series of relaxation phenomena, each of which can be described mathematically by a Debye relationship. Below 5 kHz, the principal absorption mechanism is attributed to borate and magnesium/carbonate interactions, while in the range 5 to 50 kHz the absorption arises from magnesium sulphate ion pair formation in sea water. The dependence of the various relaxation modes on oceanographic variables is outlined in quantitative terms based on results from deep ocean sound channel experiments and laboratory experiments.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1980
Accession Number
ADA099295

Entities

People

  • Daniel J. Whelan

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Coefficients
  • Acoustic Absorption
  • Acoustic Properties
  • Acoustics
  • Chemistry
  • Coefficients
  • Deep Oceans
  • Frequency
  • Intermediate Frequencies
  • Materials
  • Materials Laboratories
  • Oceanography
  • Oceans
  • Sea Water
  • Spectra
  • Water

Readers

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