ABSTRACT
Protector Attenuation 782
4. Appendix C: Audiometric Measuring Instruments 786
5. Appendix D: Audiometric Test Rooms 787
6. Appendix E: Acoustic Calibration of Audiometers 787
7. Appendix F: Calculations and Application of Age Corrections to Audiograms 788
8. Appendix G: Monitoring Noise Levels Non-Mandatory
Informational Appendix 791
8.1. What Is the Purpose of Noise Monitoring? 792
8.2. When Is it Necessary to Implement a Noise Monitoring Program? 792
8.3. How Is Noise Measured? 792
8.4. How Often Is it Necessary to Monitor Noise Levels? 793
8.5. Where Can Equipment and Technical Advice Be Obtained? 793
9. Appendix I: Definitions 793
The history of the OSHA noise regulation and the hearing conservation amendment is
complex, as with most other important regulations and laws. Comparatively little valid
and reliable scientific data were available on which to base a noise standard. Practical
measures, politics, economics, and numerous other factors played important roles in deter-
mining the final regulation. It is not our purpose to provide a historical background.
Rather, we will highlight the most important features of OSHA’s requirements to comply
with government regulations and to prevent occupational hearing loss.
