Biological verification is the daily functional check required by OSHA before each day of testing. The purpose is to detect significant drift in the audiometer's sound output since the last annual calibration — not to evaluate the examiner's hearing health. The check involves running a full audiogram on an individual with known stable hearing thresholds and comparing those results against that individual's personal baseline.
Biological verification is the daily functional check required by OSHA before each day of testing. The purpose is to detect significant drift in the audiometer’s sound output since the last annual calibration — not to evaluate the examiner’s hearing health. The check involves running a full audiogram on an individual with known stable hearing thresholds and comparing those results against that individual’s personal baseline. A deviation of 10 dB or more at any frequency indicates that the audiometer’s output has drifted and requires acoustic calibration. Any person with stable hearing thresholds can perform this function — the examiner does not need to have audiometrically normal hearing, only hearing that is stable and consistently documented. Individuals with hearing loss qualify if their thresholds are stable and their baseline is accurately recorded in the system. SHOEBOX: SHOEBOX PureTest’s daily calibration workflow guides the examiner through the biological verification step before testing begins, and logs the result as part of the session’s compliance documentation.
