SOUND ATTENUATION CHARACTERISTICS OF THE NAVY BPH-2 HELMET

Abstract

An evaluation of the real-ear sound attenuation characteristics of the Navy BPH-2 helmet was done with procedures and equipment specified by ASA Z24.22-1957. The results show that the BPH-2 has acoustical characteristics superior to the standard Army APH-5 at frequencies from 125 Hz through 1000 Hz. In view of the high attenuation in the speech communications spectrum, it is recommended that this helmet be considered for use by the U. S. Army.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1968
Accession Number
AD0667959

Entities

People

  • Robert T. Camp Jr.

Organizations

  • United States Army Aeromedical Research Lab

Tags

Communities of Interest

  • Air Platforms
  • Biomedical
  • Human Systems

DTIC Thesaurus Topics

  • Acoustics
  • Amplifiers
  • Attenuation
  • Attenuators
  • Aviation Personnel
  • Electronic Switches
  • Frequency
  • Instrumentation
  • Measurement
  • Oscillators
  • Power Amplifiers
  • Security
  • Sound Pressure
  • Spectra
  • Standards
  • Statistical Analysis
  • Test And Evaluation

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Medical Imaging.