Accession Number:

AD0753650

Title:

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

Personal Author(s):

Corporate Author:

ARMY TROPIC TEST CENTER APO NEW YORK 09827

Report Date:

1972-07-01

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

Descriptive Note:

Final rept.,

Supplementary Note:

See also report dated Apr 67, AD-653 619.

Pages:

0030

Descriptors:

Subject Categories:

Communities Of Interest:

File Size:

0.00MB

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