Company Health Medicine

Audiograms

Hearing Conservation Program

What is a baseline audiogram? 

The baseline audiogram is the reference audiogram against which future audiograms are compared. Employers

must provide baseline audiograms within 6 months of an employee’s first exposure at or above an 8-hour TWA of

85 dB. An exception is allowed when the employer uses a mobile test van for audiograms. In these instances, baseline

audiograms must be completed within 1 year after an employee’s first exposure to workplace noise at or above a

TWA of 85 dB.

What are annual audiograms?

Employers must provide annual audiograms within 1 year of the baseline Employers must compare annual

audiograms to baseline audiograms to determine whether the audiogram is valid and whether the employee has lost

hearing ability or experienced a standard threshold shift (STS). An STS is an average shift in either ear

of 10 dB or more at 2,000, 3,000, and 4,000 hertz.




At Company Health we can help you set baseline audiograms as well performing and evaluating annual audiograms using dedicated software that has the ability to perform age correction.

CAOHC certified Technicians. 




Use this link for more OSHA information on Hearing Conservation:

http://www.osha.gov/Publications/osha3074.pdf


 

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