Acoustic Propagation Loss as a Function of Variations in Sound Velocity Profile

Abstract

A study of the effects of sound velocity profile variations on acoustic propagation loss at a single location was made. This study utilized the computer programs developed at the Navy Electronics Laboratory for the CDC 1604 and subsequently translated to the IBM 7094 system at Lockheed. Four sound velocity profiles for Station 'PAPA', lat. 50 N, long. 145 W were selected, two in summer and two in winter. Computed propagation losses for a 50-yard source depth, utilizing 25 receiver depths between the surface and 500 yards, exhibited significant differences among the profiles. Losses varied by as much as 30 db at comparable ranges and depths. These variations are related to major differences in the sound velocity profiles. The greatest difference was associated with the steep positive surface layer velocity gradient of one of the two winter profiles. Significantly less propagation loss resulted from this profile than from the other three studied.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1965
Accession Number
ADB016954

Entities

People

  • K. R. Igelman
  • R. M. Lesser

Organizations

  • Lockheed Martin

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Biological Sciences
  • British Columbia
  • California
  • Caustics
  • Computer Programs
  • Convergence Zones (Sonar)
  • Data Processing
  • Electronics
  • Electronics Laboratories
  • Engineering
  • Industrial Engineering
  • Intervals
  • Leading Edges
  • Stations
  • Temperature Gradients
  • Weather Stations

Fields of Study

  • Physics

Readers

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

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems