Acoustic Diffraction. Part I. Plane Diffractors and Wedges.

Abstract

This memorandum documents the theoretical investigations in the Acoustic Diffraction Program. This report discusses the acoustic diffraction and backscattering phenomena for plane and wedge scatterers which are insonified by plane or point sources. The theories of diffraction used in this report are those of the approximate integral representations of Kirchoff-Rubinowicz. Those were compared with the geometrical theory of diffraction (GTD) which is developed by J. B. Keller, and is based on the ray theory. It was found that the integral representation agrees well with the GTD at high frequencies for infinite edges and long curved edges only. The agreement was worse when the scatterer size or edge length is finite. New expressions for diffraction from finite scatterers and edges were derived and the deviation of the GTD from these solutions were estimated. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 14, 1973
Accession Number
ADA040668

Entities

People

  • Alan D. Stuart
  • Eugene J. Skudrzyk
  • Sabih I. Hayek

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Fields
  • Acoustic Propagation
  • Coordinate Systems
  • Differential Equations
  • Diffraction
  • Equations
  • Far Field
  • Frequency
  • Geometric Forms
  • Geometry
  • Images
  • Plane Waves
  • Reflectors
  • Scattering
  • Square Roots
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering