SOUND ATTENUATION PROVIDED BY PERFORATED EARMUFFS

Abstract

Sound attenuation characteristics were determined for two types of earmuffs with perforated shells. The muffs had been perforated to allow air pressure equalization when used in a chamber where rapid barometric pressure changes take place in the presence of highly intense noise. It was found that both types of perforated muffs provided a substantial amount of ear protection even though they were not as effective as intact muffs. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1968
Accession Number
AD0677190

Entities

People

  • Harrell C. Sutherland Jr.
  • James E. Endicott

Tags

Communities of Interest

  • Biomedical
  • Human Systems

DTIC Thesaurus Topics

  • Aerospace Medicine
  • Air Force
  • Air Force Facilities
  • Air Pressure
  • Angle Of Incidence
  • Attenuation
  • Barometric Pressure
  • Chambers
  • Ear
  • Equalization
  • Foam Rubber
  • Frequency
  • Government Procurement
  • Governments
  • Loudspeakers
  • Medical Personnel
  • Perforation

Readers

  • Acoustics.
  • Structural Dynamics.