Sound Attenuation Characteristics of the DH-133A Helmet

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.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1992
Accession Number
ADA248351

Entities

People

  • Barbara A. Murphy
  • Ben T. Mozo
  • Linda S. Barlow

Organizations

  • United States Army Aeromedical Research Lab

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Agreements
  • Air Force
  • Air Force Facilities
  • Army Aviation
  • Attenuation
  • Biomedical Research
  • Commerce
  • Department Of Defense
  • Ear
  • Frequency
  • Governments
  • Health Services
  • Medical Personnel
  • Military Research
  • Patent Applications
  • Standards
  • United States

Readers

  • Acoustics.
  • Military Engineering.
  • Software Engineering