Sound Propagation Experiments Conducted under the Polar Ice Pack during the Summer of 1958

Abstract

During the summer of 1958 the U. S. Navy Underwater Sound Laboratory made sound propagation measurements in the Arctic Ocean. The group velocity of the shots over an average range of 790 kyds appears to change with time, being highest in early and late summer and lowest in midsummer. The spectrum energy curves for various-sized charges show an average slope of -17 to -24db per octave above cps. It is probable that the pack ice acting as a band rejection filter accounts for the presence of only low frequencies. The transmission loss over a range of 790 kyds averaged 103.5 db.

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Document Details

Document Type
Technical Report
Publication Date
Feb 09, 1960
Accession Number
AD0758081

Entities

People

  • Richard J. Hecht

Organizations

  • Navy Underwater Sound Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Impedance
  • Acoustic Properties
  • Acoustic Waves
  • Analyzers
  • Arctic Ocean
  • Calibration
  • Detectors
  • Filters
  • Flux Density
  • Frequency
  • Group Velocity
  • Measurement
  • Oceans
  • Recording Systems
  • Transmission Loss
  • Travel Time
  • Underwater Sound

Readers

  • Acoustics.
  • Plasma Physics.
  • Polar and Arctic Studies