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