OSHA requires a functional operation check of the audiometer before each day's use (29 CFR 1910.95(h)(5)(i)). PureTest's daily calibration routine covers three activities. The Headphones Check confirms that each transducer produces a clear tone without crackling or distortion — the examiner listens through the headphones at each channel and marks pass or fail.
OSHA requires a functional operation check of the audiometer before each day’s use (29 CFR 1910.95(h)(5)(i)). PureTest’s daily calibration routine covers three activities. The Headphones Check confirms that each transducer produces a clear tone without crackling or distortion — the examiner listens through the headphones at each channel and marks pass or fail. The Room Scan measures ambient noise in the test environment against OSHA MPANLs using the external microphone; the result is stored with that day’s audiogram records. The Biological Verification runs a brief audiogram on the examiner using their own known stable hearing thresholds to confirm that the audiometer’s output is within calibration tolerance. A deviation of 10 dB or more at any frequency requires acoustic calibration before testing proceeds (29 CFR 1910.95(h)(5)(i)). All three steps must be completed before employee testing begins.
