Some Acoustic Effects of Internal Macrostructure

Abstract

Some recent experimental developments relating to internal oceanographic-acoustic interactions are reviewed. Besides amplitude and phase fluctuations, a major concern is scattering into shadow regions. Associated oceanographic phenomena may include shear currents, turbulence and internal waves and upwelling. Experimental data show frequency independence of both scatter into shadow zones and leakage from sound channels. Propagation over sea mounts also shows the dominance of oceanographic refraction over diffraction. Preliminary results of an experiment involving a large ocean eddy are discussed.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1976
Accession Number
AD1114969

Entities

People

  • D. G. Browning
  • R. H. Mellen

Organizations

  • SACLANT ASW Research Centre

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acoustic Measurement
  • Acoustic Propagation
  • Acoustic Properties
  • Acoustic Refraction
  • Acoustic Waves
  • Acoustics
  • Diffraction
  • Drops
  • Frequency
  • Internal Waves
  • Measurement
  • Oceanography
  • Oceans
  • Pacific Ocean
  • Plane Waves
  • Power Spectra
  • Refraction
  • Ridges
  • Scattering
  • Spectra
  • Water
  • Waves

Fields of Study

  • Environmental science
  • Physics

Readers

  • Acoustical Oceanography.
  • Fluid Mechanics and Fluid Dynamics.
  • Oceanography.