Accession Number:

ADB222028

Title:

The Assessment of Sound Attenuation and Speech Intelligibility of Selected Active Noise Reduction Devices and the Communications Earplug When Used with the HGU-56/P Aviator Helmet

Descriptive Note:

Final rept.

Corporate Author:

ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL

Personal Author(s):

Report Date:

1997-01-01

Pagination or Media Count:

61.0

Abstract:

The Program Manager for Aircrew Integrated Systems PM-ACIS, formerly Aviation Life Support Equipment PM-ALSE, requested the U.S. Army Aeromedical Research Laboratory USAARL examine the status of active noise reduction ANR systems available in the marketplace. The mechanism for acquiring the devices was a Cooperative Research and Development Agreement ORDA which was implemented with three U.S. corporations. Each corporation agreed to modify three HGU-56 aviator helmets, furnished by the Government, by installing their ANR system. The modified helmets, the communications earplug CEP, and the standard HGU-56 helmet were evaluated by the USAARL Aircrew Protection Division to determine the electro-acoustic, hearing protective, and speech intelligibility characteristics. Standard techniques, using human subjects for sound attenuation and speech intelligibility, were used to complete the measurements.

Subject Categories:

  • Voice Communications
  • Human Factors Engineering and Man Machine Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE