7.57 audiometer. Device used to measure hearing sensitivity, specifically hearing level, as a function of frequency.
Annotation 1 A manual audiometer is a pure-tone audiometer in which the signal presentations, frequency, hearing level selection, and recording of results are performed manually.
Annotation 2 A Bekesy audiometer is a pure-tone audiometer where hearing level variations are under the subject’s control. Signal presentations, frequency selection or frequency variation, and recording of subject responses are implemented and recorded automatically.
Annotation 3 A computer-controlled audiometer is a pure-tone audiometer in which the test procedure is controlled by a computer.
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