SOUND ATTENUATION CHARACTERISTICS OF THE NAVY SPH-3 (MODIFIED) (LS) HELMET

Abstract

An evaluation of the real-ear sound attenuation characteristics of the Navy SPH-3 (Modified) (LS) Helmet was done with procedures and equipment specified by ASA Z24.22 - 1957. The results show that the SPH-3 (Modified) (LS) is a relatively efficient attenuator of sound throughout the audio spectrum. In view of the poor sound attenuation characteristics of the Army APH-5, it has been recommended that this helmet be replaced by the SPH-3 (Modified) (LS).

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1967
Accession Number
AD0656748

Entities

People

  • Robert L. Keiser
  • Robert T. Cam Jr.

Organizations

  • United States Army Aeromedical Research Lab

Tags

Communities of Interest

  • Biomedical
  • Human Systems

DTIC Thesaurus Topics

  • Abstracts
  • Acoustics
  • Amplifiers
  • Army Aviation
  • Army Personnel
  • Attenuation
  • Attenuators
  • Aviation Personnel
  • Classification
  • Frequency
  • Instrumentation
  • Measurement
  • Military Personnel
  • Oscillators
  • Security
  • Sound Pressure
  • Spectra

Readers

  • Acoustics.
  • Aerospace Research.
  • Computational Fluid Dynamics (CFD)