Noise Attenuation Performance of the Joint Service Aircrew Mask (JSAM) - Joint Strike Fighter (JSF) with the Lightning II Generation II Helmet

Abstract

Noise attenuation performance tests were performed on the Joint Service Aircrew Mask (JSAM)-Joint Strike Fighter (JSF) with the Lightning II Generation II (Gen II) Helmet Mounted Display (HMD) at the Air Force Research Laboratory?s (AFRL) Acoustics facilities at Wright-Patterson Air Force Base March 2012. American National Standards Institute (ANSI) methods ANSI S12.6 and S12.42 were used to measure the passive attenuation and active insertion loss performance respectively. The objective of this study was to establish a baseline for the noise attenuation performance. When comparing the total attenuation of the Gen II HMD with and without the JSAM-JSF, a degradation of 3 dB or more was found at the lower frequencies (125-500 Hz) with the addition of the JSAM-JSF. This degradation was due to the reduction of active insertion loss.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2012
Accession Number
ADA565475

Entities

People

  • Hilary L. Gallagher
  • Richard L. McKinley

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Human Systems

DTIC Thesaurus Topics

  • Acoustics
  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Attenuation
  • Degradation
  • Ear
  • Fighter Aircraft
  • Frequency
  • Insertion Loss
  • Lightning
  • Losses
  • Measurement
  • Military Research
  • Standards
  • Test Facilities
  • Warfare

Readers

  • Acoustics.
  • Human-Computer Interaction (HCI).
  • Naval Engineering and Maritime Security