Abstract
Past research has indicated the need of frequent monitoring and calibration of audiometric stimuli. This study investigated the applicability of an automatic monitor and self-calibration system for frequency and hearing level employing relevant computer peripheral equipment and a mini-digital computer. Unacceptable drifts in frequency and hearing level were intentionally introduced into the system by respectively turning the frequency selector dial of a function generator and an attenuator. After monitoring and, if indicated, computerized calibration, the signals were subsequently sampled via traditional calibration equipment to determine the frequency and hearing level parameters of the computer-revised signals. The obtained data were analyzed in terms of means, standard deviations, average deviations, and maximum errors encountered at each of six audiometric frequencies (250 Hz–8 kHz). The results of this study indicate the feasibility of providing frequent stimulus monitoring and self-calibration within a system of computerized audiometrics. [This research was supported, in part, by the University Research Council of the University of North Carolina.]
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