Impulse Wave Diffraction by Rigid Wedges and Plates.

Abstract

The problem of diffraction of acoustic signals by rigid barriers is studied empirically. Backward and forward diffraction from a 90 degree wedge and a thin plate are analyzed. Attempts to measure the diffracted energy in the illuminated region over the apex of the barrier, where direct and reflected signals coexist with diffracted, are discussed. Factors influencing the choice of the barriers' physical dimensions and composition are listed, as are the problems surrounding the selection of an ideal sound source and receiver. Finally, the data are compared to the theory by Biot and Tolstoy (Journal of the Acoustical Society of America, v. 29, 1957) and found to be in good agreement with predictions. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1978
Accession Number
ADA066476

Entities

People

  • Joseph Henry Bremhorst

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Absorption
  • Acoustic Signals
  • Acoustics
  • Anechoic Chambers
  • Computer Programming
  • Computer Programs
  • Computers
  • Diffraction
  • Doppler Effect
  • Frequency
  • Materials
  • Measurement
  • Military Research
  • Physics
  • Plastic Explosives
  • Processing Equipment
  • Research Facilities

Readers

  • Acoustical Oceanography.
  • Electrical Engineering
  • Materials Science and Engineering.