Graph of hearing threshold level as a function of frequency.

Baseline Audiogram

The audiogram obtained from an audiometric examination administered before employment or within the first 30 days of employment that is preceded by a period of at least 12 hr of quiet. The baseline audiogram is the audiogram against which subsequent audiograms will be compared for the calculation of significant threshold shift.

See also: Audiometer, Hearing.

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Subjects: Audio Medical