Sound Attenuation Characteristics of the Standard DH-132A and SPH-4 Helmets Worn in Combination with Standard Issue Earplugs

Abstract

The Health Hazard Assessment (HHA) of Army systems usually requires a review of noise and hearing protection associated with the systems used. Hearing protection for crews in combat vehicles is specified to be the DH-132A and, in some cases where noise levels are extremely high, earplugs are worn in combination with the helmet in order to provide adequate protection. Hearing protection for Army helicopter crewmembers is the SPH-4 helmet with a few exceptions. The attenuation data used for the HHA are measured at this Laboratory. This report incorporates the results of attenuation measurements of the SPH-4 and DH-132A helmets worn in combination with the standard Army issue earplugs. Earplugs used in the study were the single flange, triple flange, and yellow/white foam plug.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1993
Accession Number
ADA263011

Entities

People

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

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Aircrafts
  • Army Aircraft
  • Army Aviation
  • Artillery
  • Biomedical Research
  • Combat Vehicles
  • Health Services
  • Hearing Protection
  • Medical Laboratories
  • Medical Personnel
  • Military Research
  • Standards
  • United States
  • United States Central Command
  • Warfare

Readers

  • Acoustics.
  • Aviation Safety Risk Assessment.
  • Military Engineering.