Measurement of Auditory Threshold with a Special Purpose Analog Computer

Abstract
Fifty-four experimental runs with normal hearing adults exposed to 1024 clicks at 100 msec intervals at 6-suprathreshold and 4 sub-threshold levels were analyzed by a special purpose analog computer designed to study evoked auditory responses by gross electrode techniques from the skulls of intact humans and showed a systematic change in response form with changes in intensity. Total subthreshold and silent control runs were relatively flat. 20 additional subjects were run with an additional button-pressing requirement with 92% of the 120 suprathreshold runs correctly indicated by button-pressing.