ACOUSTIC TRANSMISSION IN AN OCEAN SURFACE DUCT

Abstract

Surface duct accoustical transmission measurements were performed in two areas of the Pacific Ocean. Three frequencies, three transmitter depths and three receiver depths were employed. Both areas demonstrated a persistent surface duct but they differed in that one water mass was stable and the other unstable. Experimental transmission loss curves gave good agreement with theoretical curves based upon normal mode theory. It was not possible to distinguish between the acoustic properties of the two areas either by the experimental transmission loss data or by an analysis of the observed signal variability.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1964
Accession Number
AD0645297

Tags

Communities of Interest

  • Advanced Electronics
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acoustic Frequencies
  • Acoustic Properties
  • Acoustic Signals
  • Acoustic Velocity
  • Attenuators
  • Bathythermographs
  • Data Analysis
  • Data Reduction
  • Electronics
  • Electronics Laboratories
  • Frequency
  • Internal Waves
  • Magnetic Tape
  • Measurement
  • Recording Systems
  • Transmission Loss
  • Water Masses

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Wave Propagation and Nonlinear Chaotic Dynamics.