Noise Attenuation Performance of Flight Helmets in Combination with the Stealth Cup and the Fully-Articulating Air Bladder System (FAABS)

Abstract

Noise attenuation performance measurements were conducted on the HGU-55/P, HGU-68/P, and HGU-84/P flight helmets in combination with the Stealth Cup and the Fully-Articulating Air Bladder System (FAABS), developed by SPEAR Labs. Measurements were also collected on the helmets' most commonly used earcups and regular shims to facilitate a direct comparison among the same sample of subjects. Passive insertion loss was measured in accordance with ANSI S12.42 while passive noise attenuation was measured in accordance with ANSI S12.6. Four ear cups, including the Stealth Cup, were tested in combination with the HGU-55/P helmet and FAABS. The Stealth Cup was also tested in combination with the HGU-68/P and HGU-84/P flight helmets. The Stealth Cup was an equal, if not better, performer in comparison to currently used earcups across all frequencies. The FAABS was also an equal performer when compared to the currently used shims.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2013
Accession Number
ADA589260

Entities

People

  • Hilary L. Gallagher
  • Melissa A. Theis

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Acoustics
  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Attenuation
  • Department Of Defense
  • Ear
  • Flight Helmets
  • Frequency
  • Government Procurement
  • Governments
  • Hearing Protection
  • Helmets
  • Insertion Loss
  • Losses
  • Measurement
  • Test Facilities

Readers

  • Acoustics.
  • Military Engineering.