THE USE OF CIRCUMAURAL EARPHONES IN AUDIOMETRY

Abstract

Four circumaural muffs were compared with the phone/cushion device now standard for audiometry, the Willson 'Sound-Barrier', the Maico 'Auraldome', and 2 versions of the Tracor 'Otocup'. Psychoacoustic loudness balancing by normal subjects was performed, and physical measurements by probe-tube microphone and by flat-plate coupler. Neither physical method was related closely enough at 4+ kHz to the fundamental loudness balancing to serve as an independent calibration system for all circumaural muffs.

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Document Details

Document Type
Technical Report
Publication Date
Jul 15, 1968
Accession Number
AD0678918

Entities

People

  • J. Donald Harris

Organizations

  • Naval Submarine Medical Research Laboratory

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Acoustic Measurement
  • Ambient Noise
  • Audiometry
  • Biomedical Research
  • Calibration
  • Classification
  • Ear
  • Earphones
  • Electron Tubes
  • Frequency
  • Loudness
  • Measurement
  • Microphones
  • Navy
  • Security
  • Sound Pressure
  • Standards

Readers

  • Acoustics.