A Nearfield Model of the Parametric Radiator.

Abstract

It is often necessary to measure and operate parametric radiators under conditions where finite range effects are important. A nearfield model is presented in which the source level is obtained by assuming the primary waves to be plane-cylindrical or diverging-conical depending upon whether the observation range is less or greater than the Rayleigh distance. Asymptotic beam patterns are obtained from the solution of an exponentially tapered line array. Nonlinear attenuation is not considered. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 31, 1975
Accession Number
ADA083554

Entities

People

  • R. H. Mellen

Organizations

  • Naval Underwater Systems Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Absorption
  • Center Of Gravity
  • Complex Variables
  • Connecticut
  • Contour Integrals
  • Difference Frequency
  • Echo Ranging
  • Frequency
  • Geometry
  • Integrals
  • Lepidoptera
  • Plane Waves
  • Range Finding
  • Secondary Waves
  • Waves

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Combustion and Flow Dynamics.
  • Seismology