Noise Attenuation Performance of the Joint Service Aircrew Mask (JSAM) Type 1 (MPU-5) Rotor Wing (RW) with Flight Helmets

Abstract

Noise attenuation performance tests were performed on the Joint Service Aircrew Mask (JSAM) Type I (MPU-5) Rotor Wing (RW) with the HGU-56/P and HGU-84/P helmets at the Air Force Research Laboratory's (AFRL) Acoustics facilities at Wright-Patterson Air Force Base September 2009. The MPU-5 was tested and compared to legacy masks (M-45, AERP, and AR-5). An American National Standards Institute (ANSI) method ANSI S- 12.42-1995(R2004) was used to measure the passive attenuation. Passive insertion loss was comparable for all systems in combination with HGU-56/P. The AR-5 did outperform the MPU-5 across all frequencies when tested in combination with HGU-84/P. In addition, the MPU-5 causes significant degradation of the helmet attenuation when comparing the helmet with and without the MPU-5.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2011
Accession Number
ADA550649

Entities

People

  • Hilary L. Gallagher
  • Richard L. McKinley

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Counter WMD
  • Human Systems

DTIC Thesaurus Topics

  • Acoustics
  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Attenuation
  • Degradation
  • Ear
  • Flight Helmets
  • Frequency
  • Government Procurement
  • Hearing Protection
  • Insertion Loss
  • Losses
  • Military Research
  • Performance Tests
  • Standards
  • Test Methods

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Aerospace Engineering
  • Computer Programming and Software Development.