ACOUSTICS TESTS IN PUERTO RICO.

Abstract

The results of a field test to determine the directional characteristics of acoustic waves propagated through a jungle from overflying aircraft are presented. In general, when aircraft are directly over the test site, the sound at a point 20 ft. above the ground arriving from the direction of the ground measures about 6 dB lower than sound arriving from overhead. As the aircraft becomes further from the test site, the difference becomes less. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1968
Accession Number
AD0676197

Entities

People

  • Robert H. Carson

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Aircrafts
  • Directional
  • Field Tests
  • Physics
  • Puerto Rico
  • Underwater Acoustics
  • Waves

Readers

  • Acoustics.
  • Aerospace Test and Evaluation
  • Radar Systems Engineering.