Propagation of High-Intensity, Low-Frequency Sound without Loss

Abstract

This report describes a research program on sound propagation conducted under the In-house Laboratory Independent Research program. The objective of this work was to develop a concept to transmit high-intensity, low- frequency sound over a distance without large losses of sound-pressure level. An arbitrary goal of reducing the normal inverse square propagation law by 50 percent was chosen and achieved in the regions tested. A hyperbolic lens and hemispherical reflector were developed and tested for directivity improvement.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1970
Accession Number
AD0869978

Entities

People

  • Kenneth J. Oscar
  • Terence T. Bordelon

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Amplifiers
  • Frequency
  • Microphones
  • Plane Waves
  • Plastic Explosives
  • Power Supplies
  • Recording Systems
  • Refraction
  • Refractive Index
  • Sound Generators
  • Sound Pressure
  • Sound Waves
  • Tape Recorders
  • Test Equipment
  • Transducers
  • Waves

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Phased Array Antenna Design.