CONTRALATERAL THRESHOLD SHIFT AND REDUCTION IN TEMPORARY THRESHOLD SHIFT AS INDICES OF ACOUSTIC REFLEX ACTION

Abstract

An experiment is presented which compares the effectiveness of narrow band noise and a train of clicks in eliciting the middle ear acoustic reflex and to correlate two methods of estimating amount of reflex activation. One method involved measurement of increase in threshold in the contralateral ear; the other, measurement of reduction of TTS produced by a series of gun shots. Sixteen subjects were employed. Shifts produced by the clicks and noise were of the same order of magnitude (after correction for the direct masking effect by the clicks), but there was considerable reflex adaptation to the noise and none for the clicks. Correlations between contralateral threshold shift and reduction of TTS were small and not significant.

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Document Details

Document Type
Technical Report
Publication Date
Aug 22, 1961
Accession Number
AD0263260

Entities

People

  • J. L. Fletcher
  • Martin P. Loeb

Organizations

  • United States Army Medical Research Laboratory

Tags

DTIC Thesaurus Topics

  • Attenuation
  • Behavioral Sciences
  • Biological Sciences
  • Biomedical Research
  • Ear
  • Engineering
  • Health Services
  • Human Factors Engineering
  • Measurement
  • Military Research
  • New York
  • North Carolina
  • Physiology
  • Psychology
  • Psychophysiology
  • Test Facilities
  • Three Dimensional

Fields of Study

  • Psychology

Readers

  • Acoustics.
  • Auditory Neuroscience/Auditory Physiology.
  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience