The OSHA Form 300 is used to document all workplace illnesses and injuries. Hearing loss caused or aggravated by workplace noise is a workplace illness when the following conditions apply:
- The current hearing test shows:
- Average thresholds of >25dB at 2KHz, 3KHz and 4KHZ relative to audiometric zero, in either ear, and in the same ear, an
- Average change of >10dB at 2KHz, 3KHz and 4KHZ compared to the baseline, in the same ear
- Workplace noise caused or contributed to the average change in hearing. This can be determined through a thorough Work Relatedness Evaluation.