COMPARISON OF SEVEN SYSTEMS FOR AIR CONDUCTION AUDIOMETRY FROM 8-20 KC/S

Abstract

Seven equipment systems were assembled to study human auditory acuity from 8-20 kilocycles/sec. Twenty-eight ears were examined. Two loudspeakers and two earphones were utilized, two types of stimulus (pure tones and narrow bands of noise, and two psychometric methods (Limits and Adjustments)). All systems were capable of providing usably reliable thresholds throughout the whole frequency range. When objectively calibrated, several systems (those involving loudspeakers, as well as those involving earphones), yielded quite comparable reference threshold sound pressure levels as inferred at the eardrum. A slight preference was expressed for a system, the method of using Bekesy threshold-tracking, with a changing-frequency noise band 300 c/s in width, and for a discrete-tone system which uses the Method of Constants.

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Document Details

Document Type
Technical Report
Publication Date
Feb 18, 1969
Accession Number
AD0691367

Entities

People

  • Cecil K. Myers
  • J. Donald Harris

Organizations

  • Naval Submarine Medical Research Laboratory

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Audiometry
  • Auditory Acuity
  • Biomedical Research
  • Calibration
  • Ear
  • Earphones
  • Electrical Equipment
  • Free Field
  • Frequency
  • Hearing
  • Loudness
  • Loudspeakers
  • Microphones
  • Navy
  • Sound Pressure
  • Standards
  • Transducers

Readers

  • Acoustics.
  • Auditory Neuroscience/Auditory Physiology.
  • Mathematics or Statistics

Technology Areas

  • AI & ML
  • AI & ML - Bayesian Inference