Comparison of Real-Ear Attenuation Characteristics of the Standard SPH-4 Earcup and a Prototype Crushable Earcup,

Abstract

The use of the SPH-4 aviator's helmet in the Army is to provide hearing protection, voice communications, and head protection against impact. Efforts have been made recently to improve protection in the region of the earcup. In 1977, USAARL contracted with Simula Incorporated to develop an earcup which would provide greater energy absorption on impact and still provide sound attenuation equivalent to the current standard earcup. A prototype has been submitted for evaluation of noise attenuation and comparison to the current standard earcup. The crushable earcup was found to provide greater hearing protection at most test frequencies.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1983
Accession Number
ADA138042

Entities

People

  • B. T. Mozo
  • W. R. Nelson

Organizations

  • United States Army Aeromedical Research Lab

Tags

Communities of Interest

  • Biomedical
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Army Aviation
  • Artillery
  • Attenuation
  • Department Of Defense
  • Frequency
  • Health Services
  • Hearing Protection
  • Human Factors Engineering
  • Military Research
  • Prototypes
  • Security
  • Sound Pressure
  • Standards
  • Test And Evaluation
  • United States
  • Voice Communications

Readers

  • Acoustics.
  • Explosive Engineering.