| # | Letters of Interpretation |
|---|---|
| 1 | - 1910.95 App D - The use of ANSI S3.1-1999 (R2018) MPANLs for audiometric testing |
| 2 | - 1910.95 App D - Measurement of background noise levels for audiograms |
| 3 | - 1910.95 App D - Frequency of evaluating audiometric testing rooms to meet the specifications in Appendix D of the Occupational Noise standard. |
| 4 | - 1910.95 App D - Use of the "hold" switch on audiometers when background noise levels exceed the criteria in Table D-1. |
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