Accession Number : ADA248732

Title :   Sound Attenuation Characteristics of the DH-133A Helmet.

Descriptive Note : Final rept.,

Corporate Author : ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL

Personal Author(s) : Mozo, Ben T. ; Murphy, Barbara A. ; Barlow, Linda S.

Report Date : JAN 1992

Pagination or Media Count : 26

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.

Descriptors :   *HELMETS, *SOUND, *PROTECTIVE EQUIPMENT, ATTENUATION, DOCUMENTS, HEAD(ANATOMY), HEARING, KITS, PLASTICS, SPECIFICATIONS, STABILITY, STANDARDS, TENSION.

Subject Categories : Bionics
      Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE