What should the results of annual hearing tests be compared to?

The results of annual hearing tests should be compared to a baseline test obtained prior to exposure. This benchmark is crucial because it provides a reference point to assess any changes in an individual's hearing ability over time, specifically in response to workplace noise or other harmful exposures. The baseline test reflects the worker's hearing status before potential damaging exposure, making it easier to identify any shifts that may suggest hearing loss or deterioration related to occupational hazards.

Using the baseline comparison allows for the implementation of effective hearing conservation measures if impairment is detected. Such proactive monitoring is essential in environments where noise exposure is prevalent and can lead to hearing-related health issues. Comparisons to other factors, like environmental noise levels or general health records, do not specifically address the direct impact of exposure on hearing abilities in the same way as a baseline assessment.