#	Letters of Interpretation
1	02/25/2026 - 1910.95(h)(3) - Bone conduction audiometry in lieu of pure tone air conduction audiometry for employees with severe hearing loss
2	02/25/2026 - 1910.95(h)(1) - Bone conduction audiometry in lieu of pure tone air conduction audiometry for employees with severe hearing loss
3	02/25/2026 - 1910.95(h), 1910.95(h)(1), 1910.95(h)(3) - Bone conduction audiometry in lieu of pure tone air conduction audiometry for employees with severe hearing loss
4	04/28/2021 - 1910.95(h)(4) - Measurement of background noise levels for audiograms
5	03/21/2019 - 1910.95(h) - OSHA's Noise Standard as it applies to Supra Aural Phones for audiometric testing
6	03/08/2011 - 1910.95(h) - Clarification on whether a successor employer may establish a new baseline audiogram for employees of the former employer.
7	04/23/2010 - 1910.95(h)(5)(ii) - Whether use of an artificial ear ISO 318 coupler complies with the noise standard.
8	04/23/2010 - 1910.95(h)(5) - Whether use of an artificial ear ISO 318 coupler complies with the noise standard.
9	02/14/2005 - 1910.95(h)(4) - Frequency of evaluating audiometric testing rooms to meet the specifications in Appendix D of the Occupational Noise standard.
10	12/13/1989 - 1910.95(h)(2) - Audiometric earphones to be reviewed for acceptability for audiometric testing.
11	08/30/1984 - 1910.95(h)(5)(i) - Quest Bio Acoustic Simulator may be used for daily audiometer checks.
12	06/08/1983 - 1910.95(h)(5) - Audiometer calibration requirements of the March 8, 1983 Hearing Conservation Amendment.