Long-Range, Deep-Ocean Propagation of 15-Hz CW Acoustic Signals.

Abstract

The acoustic field of a shallow continuous-wave source operating near 15-Hz was measured at a deep sound-channel hydrophone located near Midway Island. The source was towed repeatedly between 700-km range and 1700-km range along a great circle track whose extension passed through the receiver. Although the possibility of long-range transmission of low-frequency acoustic energy via bottom-bounce and bottom-penetrating paths has been postulated, analysis of the 15-Hz transmission loss curves indicated that the only long-range propagation paths of significance were those which did not interact with the bottom.

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Document Details

Document Type
Technical Report
Publication Date
Aug 09, 1979
Accession Number
ADA073348

Entities

People

  • A. N. Guthrie
  • D. A. Nutile
  • J. D. Shaffer
  • R. Fitzgerald
  • W. R. Hahn

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Fields
  • Acoustic Propagation
  • Acoustic Properties
  • Acoustic Signals
  • Acoustics
  • Bathymetry
  • Birds
  • Deep Oceans
  • Design Depths
  • Explosives
  • Intensity
  • Losses
  • Measurement
  • Military Research
  • Navigation
  • Navy
  • Transmission Loss

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.