A Modification of the H-133 Ground Communications Headset for Use in Intense Noise Environments

Abstract

Detailed technical information and instructions are provided for a simple modification of the Air Force standard H-133 ground communications headset for use in intense noise environments at levels of 135 db (SPL) and higher. This modification involves the replacement of the conventional H-136 earphone with a miniaturized receiver mounted on a custom molded insert earplug. An adaptor box-line potentiometer is fabricated to provide manual control of the level of the speech signal at the ear of the wearer. The modified H-133 communications headset has been utilized at selected Air Force bases by ground maintenance personnel who rate the hearing protection and voice communications performance as excellent. Keywords included: Voice communications, Communications in noise, Hearing protection, Communications headset, and Sound attenuation.

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Document Details

Document Type
Technical Report
Publication Date
Mar 07, 1986
Accession Number
ADA166981

Entities

People

  • Charles W. Nixon
  • Henry C. Sommer

Organizations

  • Armstrong Laboratory

Tags

Communities of Interest

  • Biomedical
  • Human Systems

DTIC Thesaurus Topics

  • Air Force
  • Air Force Aircraft
  • Aircrafts
  • Biomedical Research
  • Communication Equipment
  • Communication Systems
  • Connectors
  • Digital Audio
  • Ear
  • Earphones
  • Electroacoustic Transducers
  • Hearing Protection
  • Maintenance
  • Noise Reduction
  • Photographs
  • Standards
  • Voice Communications

Readers

  • Acoustics.
  • Aerospace Test and Evaluation
  • Speech Processing/Speech Recognition.