Sound Attenuation Evaluation of the Navy's HGU-84/P Helicopter Helmet.

Abstract

First article sound attenuation tests were conducted on samples of the HGU-84/P helicopter helmet, candidate replacement for the SPH-3C series of helmets, supplied for evaluation by the Naval Air Warfare Center Aircralt Division, Warminster, Pennsylvania. The tests were conducted in accordance with American National Standard ANSI 512.6-1984, Method for the Measurement of Real-Ear Attenuation of Hearing Protectors. Objective measurements of attenuation, microphone-in-real-ear (MIRE), were also obtained for database and record purposes. Ten Marine Corps student aviators in the Naval Aviation Flight Training Program served as volunteer test subjects. Real-ear attenuation values calculated from measurements made at the nine, one-third octave test frequencies met or exceeded the required minimum real-ear attenuation specifications for the newly developed helmet. This technical memorandum documents the results of the sound attenuation tests. The HGU-84/P helmet is currently being fielded as a replacement for the SPH-3C helmet. (AN)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1995
Accession Number
ADA296871

Entities

People

  • C. E. Williams
  • D. W. Maxwell

Organizations

  • Naval Aerospace Medical Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Biomedical

DTIC Thesaurus Topics

  • Abstracts
  • Aerial Warfare
  • Aircrafts
  • Biomedical Research
  • Databases
  • Department Of Defense
  • Flight Training
  • Frequency
  • Helicopters
  • Military Organizations
  • Naval Aviation
  • Navy
  • Pennsylvania
  • Test And Evaluation
  • Test Facilities
  • United States
  • Warfare

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Military Engineering.
  • Software Engineering