Accession Number:

ADA248351

Title:

Sound Attenuation Characteristics of the DH-133A Helmet

Descriptive Note:

Final rept.

Corporate Author:

ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL

Report Date:

1992-01-01

Pagination or Media Count:

26.0

Abstract:

This report documents the sound attenuation characteristics of a product improvement of the standard DH-132A helmet. Results indicate the improved helmet exceeds the attenuation required by the specification at all test frequencies and is significantly better than the DH-132 at most frequencies. A spring tension band between the earcups, improves earcup-to-head retention. A thermo-plastic liner improves stability and comfort. All of the improvements are available in kit form for field upgrade of fielded DH-132A helmets. Sound attenuation, Tanker helmet, Hearing thresholds.

Subject Categories:

  • Acoustics
  • Protective Equipment
  • Noise Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE