A MONAURAL COMPARISON OF TWO CIRCUMAURAL EARPHONES WITH A STANDARD AUDIOMETRIC EARPHONE

Abstract

A new procedure is described for determining the real-ear frequency response of an earphone when it is coupled to a human head. The air-conducted output of a standard and of a new earphone are successively adjusted to equal loudness with the constant reference loudness of a bone-conducted tone. Differences in voltages between the two earphones, at equal loudness, constitute a transfer function from the old to the new phone. The problem to the subject is a simple one of monaural loudness discrimination; the transfer function is determined with about twice the precision and in no more than one-fourth the time of the usual alternate interaural loudness balancing with 'ear-reversal' to allow for audiometric differences between the two ears.

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Document Details

Document Type
Technical Report
Publication Date
Sep 03, 1969
Accession Number
AD0699927

Entities

People

  • J. Donald Harris
  • Virginia Morse

Organizations

  • Naval Submarine Medical Research Laboratory

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Abstracts
  • Biomedical Research
  • Classification
  • Discrimination
  • Earphones
  • Frequency
  • Frequency Response
  • Intervals
  • Judgment
  • Loudness
  • Navy
  • Precision
  • Security
  • Sound Pressure
  • Standards
  • Submarine Bases
  • Transfer Functions

Readers

  • Acoustics.
  • Auditory Neuroscience/Auditory Physiology.
  • Calculus or Mathematical Analysis