A Technique for Optimal Fitting of Flight Helmets

Abstract

Although flight helmets selected for Navy use may possess exceptionally good noise attenuation qualities, maximum attenuation may not always be realized when the helmet is worn, particularly if the helmet does not fit. The lack of a standardized procedure for fitting flight helmets often results in a poor compromise that sacrifices noise exclusion for comfort. A procedure that involves the use of a noise source and an automatic recording audiometer has been developed as an aid in the fitting process. The noise source allows the aviator to detect acoustical leakage around his ears so that a better fit can be effected. Masked hearing threshold levels obtained with the helmet's earphones may be used to demonstrate improved performance.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 30, 1970
Accession Number
AD0718327

Entities

People

  • James W. Greene

Organizations

  • Naval Aerospace Medical Research Laboratory

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Acoustic Absorption
  • Air Gaps
  • Aircraft Noise
  • Aircrafts
  • Ambient Noise
  • Anechoic Chambers
  • Attenuation
  • Earphones
  • Flight Helmets
  • Frequency
  • Hearing Disorders
  • Hearing Loss
  • Helmets
  • Military Medicine
  • Noise
  • Performance Tests
  • Test And Evaluation

Readers

  • Acoustics.
  • Applied Combinatorial Optimization and Logic Circuit Design.
  • Aviation Science / Aeronautics.