Improving an Empirical Formula for the Absorption of Sound in the Sea

Abstract

A new empirical formula for the absorption of sound in seawater is derived. The starting point of this investigation is the formula proposed by Ainslie and McColm for attenuation due to the boron and magnesium relaxations. Constants in the expression are treated as parameters to be determined. Since this is a nonlinear inverse problem, a global search is used to find the parameter setting that yields the best fit to in situ absorption measurements. The obtained formula is simpler than and at least as accurate as the widely used absorption formula of Francois and Garrison.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2008
Accession Number
ADA486388

Entities

People

  • C. A. Van Moll
  • J. Janmaat
  • M. A. Ainslie

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Absorption
  • Abstracts
  • Accuracy
  • Attenuation
  • Baffin Bay
  • Baltic Sea
  • Boric Acids
  • Chi Square Test
  • Data Sets
  • Frequency
  • Fresh Water
  • Fungi
  • Magnesium
  • Measurement
  • Probability
  • Sea Water
  • Statistics

Readers

  • Acoustical Oceanography.
  • Regression Analysis.
  • Spectroscopy.