Regulations last checked for updates: Jan 18, 2025

Title 40 - Protection of Environment last revised: Dec 30, 2025
Appendix Appendix A - Appendix A to Part 211—Compliance Audit Testing Report
Data Sheet Company name: Address: Test laboratory: Address: Model number of hearing protector: Category designation: Production date: Test Results—Frequency, Mean Attenuation, and Standard Deviation 125 250 500 1000 2000 3150 4000 6300 8000 Noise Reduction Rating:

If replacement hearing protector was necessary to conduct test, reason for replacement:

This report is submitted under sections 8 and 13 of the Noise Control Act of 1972. All testing, for which data are reported here, was conducted in strict conformance with applicable regulations under 40 CFR Part 211, et seq. All the data reported here are true and accurate representations of this testing. All other information reported here is, to the best of (company name) and (test laboratory name) knowledge, true and accurate. I am aware of the penalties associated with violation of the Noise Control Act of 1972 and the regulations published under it.

(Authorized representative of company) (Authorized representative of test laboratory) [44 FR 56139, Sept. 28, 1979. Redesignated at 47 FR 57717, Dec. 28, 1982]
source: 44 FR 56127, Sept. 28, 1979, unless otherwise noted.