STUDIES IN SHORT DURATION AUDITORY FATIGUE. 5. AN INVESTIGATION OF THE SPREAD OF FATIGUE WITHIN NARROW FREQUENCY LIMITS

Abstract

If a tone is sounded in one ear and immediately a second tone is sounded, there is a decrease in sensitivity to the second tone. A 1000 cps. tone was presented to five observers for 435 msec. followed by a silent interval of 35 msec., then a test tone of 50 msec. was presented. The first tone was given at sensation levels of 30-90 db. in 10 db. steps. Frequencies of the second tone were varied randomly from 900-1100 cps. The greatest decrement in sensitivity was found for test tones from 990-1010 cps. in the form of a broad spread at the higher sensations levels. At the lower sensation levels only a slight effect was found. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 16, 1952
Accession Number
AD0638179

Entities

People

  • Anita I. Rawnsley
  • J. D. Harris

Tags

Communities of Interest

  • Biomedical
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Impedance
  • Biomedical Research
  • Ear
  • Electrical Equipment
  • Frequency
  • Frequency Standards
  • Human Factors Engineering
  • Intensity
  • Membranes
  • Navy
  • Nerve Fibers
  • Oscillators
  • Pitch Discrimination
  • Repetition Rate
  • Sensation
  • Sensitivity
  • Standards

Readers

  • Auditory Neuroscience/Auditory Physiology.
  • Mathematics or Statistics
  • Radar Systems Engineering.