The Rough Surface and Bubble Effects on Sound Propagation in a Surface Duct,

Abstract

Theories of rough surface scatter and gas bubble behavior are used with the Pierson-Moskowitz wind-wave spectrum and an empirically-guided formulation of bubble concentrations at sea to calculate the true velocity gradient and losses 'at the surface'. These values are then entered into Bucker's wave theory solution for sound propagation and leakage in a surface duct. Curves of propagation loss are calculated for comparison with ocean test data obtained with the SQS-26 sonar. The predictions are shown to be significantly better than those based on the empirical equations of project AMOS. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 12, 1971
Accession Number
ADA043823

Entities

People

  • Herman Medwin

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Measurement
  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Angle Of Incidence
  • Curvature
  • Gases
  • Geometry
  • Measurement
  • Oceans
  • Particles
  • Physics
  • Probability
  • Reflection
  • Sound Pressure
  • Water
  • Wave Propagation

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Marine Hydrodynamics
  • Regression Analysis.