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June 1957

Self-Recording Threshold Audiometry and Recruitment

Author Affiliations

Turku, Finland
From the Department of Otolaryngology, University of Turku.

AMA Arch Otolaryngol. 1957;65(6):591-602. doi:10.1001/archotol.1957.03830240047010

The measurement of auditory thresholds is ordinarily made by presenting the subject with tones of sufficiently varying intensity to obtain a point where he reports hearing the tone in 50% of the presentations. Although the number of given stimuli is generally not large in routine clinical work, the procedure, nevertheless, is a statistical measurement: The threshold is expressed as the mean of the observations between the intensities of the just-heard tone and the just-not-heard tone. The threshold is not simply the single figure expressed in decibels but an area around this figure with a width of 5 to 15 db., depending mostly on the mode of the stimulation1 and on the reaction time of the subject.

The area between 0 and 100% responses to the stimuli can be charted with all methods of tone presentation. However, the method of limits and the method of constant stimuli are quite time-consuming

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