Jungle Acoustics III: Effects of an Acoustic Filter on the Detection of Voices through the Jungle Canopy.

Abstract

The United States Army Tropic Test Center conducted a study of auditory detectability of human voices from the jungle floor through the canopy in the Panama Canal Zone during October and November 1970 (wet season) and April 1971 (dry season). A total of 240 transmissions were made from a speaker system to acoustic sensors at heights ranging from 5 to 100 feet. Voice transmissions were conducted at slant range distances from 600 to 1200 feet from sensors. The recorded transmissions were later played back to a total of 60 soldiers from TOE units under two conditions-filtered and unfiltered. The soldier listeners attempted to distinguish human vocies from natural jungle ambient noises. The study demonstrated that filtering and vertical sensor position have a significant impact on the detection capabilities of an acoustic sensor system tested or operationally deployed in jungle areas. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1972
Accession Number
AD0753650

Entities

People

  • Adrian U. Dubuisson
  • Delaney A. Dobbins

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Acoustic Detectors
  • Acoustic Filters
  • Acoustics
  • Ambient Noise
  • Detection
  • Detectors
  • Filters
  • Filtration
  • Panama Canal
  • Slant Range
  • United States
  • Voice Communications

Readers

  • Acoustics.
  • Sensor Fusion and Tracking Systems.
  • Urban Planning and Geography.