Standards
Noise and hearing conservation is addressed in specific standards for recordkeeping, general industry, maritime, and construction employment. This section highlights OSHA standards, Federal Registers (rules, proposed rules, and notices), directives (instructions for compliance officers) for General Industry and Maritime employment. Twenty-five states, Puerto Rico and the Virgin Islands have OSHA-approved State Plans, which are required to be at least as effective as Federal OSHA, and may have adopted their own standards and enforcement policies. For the most part, these States adopt standards that are identical to Federal OSHA. However, some States have adopted different standards applicable to this topic or may have different enforcement policies. Other federal standards and consensus standards related to occupational noise exposure are included for reference.
OSHA Standards
Recording and reporting occupational injuries and illness (29 CFR 1904) [related topic page]
- 1904.10, Recording criteria for cases involving occupational hearing loss
General Industry (29 CFR 1910)
- 1910.95, Occupational noise exposure
- Appendix A, Noise exposure computation
- Appendix B, Methods for estimating the adequacy of hearing protector attenuation
- Appendix C, Audiometric measuring instruments
- Appendix D, Audiometric test rooms
- Appendix E, Acoustic calibration of audiometers
- Appendix F, Calculations and application of age corrections to audiograms
- Appendix G, Monitoring noise levels non-mandatory informational appendix
- Appendix H, Availability of referenced documents
- Appendix I, Definitions
- Section 5(a)(1) of the OSH Act, often referred to as the General Duty Clause, requires employers to "furnish to each of his employees employment and a place of employment which are free from recognized hazards that are causing or are likely to cause death or serious physical harm to his employees". This section may be used to address hazards for which there are no specific standards, eg. noise in agricultural operations.
OSHA Federal Registers
- Occupational Injury and Illness Recording and Reporting Requirements. Final Rules 67:44037-44048, (2002, July 1). Revises the criteria for recording hearing loss cases in several ways, including requiring the recording of Standard Threshold Shifts (10 dB shifts in hearing acuity) that have resulted in a total 25 dB level of hearing above audiometric zero, averaged over the frequencies at 2000, 3000, and 4000 Hz, beginning in the year 2003.
- Search all available Federal Registers for noise.
OSHA Directives; Instructions to OSHA staff
- Field Operations Manual (FOM) [4 MB PDF*, 380 pages]. CPL 02-00-150, (2011, April 22).
- Hearing Conservation Program. PER 04-00-0004, (2008, June 6).
- OSHA Technical Manual (OTM). TED 01-00-015 [TED 1-0.15A], (1999, January 20).
- Technical Equipment. 08-05 (TED 01), (2008, June 24). Contains information on noise monitors and meters, including descriptions and techniques for the use of sound level meters and dosimeters.
- Noise and Hearing Conservation. eTool. Comprehensive information on evaluating and controlling noise.
- Guidelines for Noise Enforcement; Appendix A. CPL 02-02-035 [CPL 2-2.35A], (1983, December 19). Lists several factors to consider and document in the case file with regard to comparing the relative degree of attenuation of personal protectors and engineering and/or administrative controls.
- Occupational Noise Exposure; Hearing Conservation Amendment, 29 CFR 1910.95. CSP 01-01-016 [STP 2.21], (1981, December 12). Describes the requirements of each regional administrator under a federal program change that affects state programs.
- Search all available directives for noise.
OSHA Enforcement Standard Interpretations
- Search all available standard interpretations for noise.
Other Federal Agency's Standards and Guidance
Note: These are NOT OSHA regulations. However, they do provide guidance from their originating organizations related to worker protection.
Environmental Protection Agency (EPA)
- 40 CFR 211, Product Noise Labeling
Federal Railroad Administration (FRA)
- 49 CFR 227, Occupational Noise Exposure for Railroad Operating Employees. Requires railroads to conduct noise monitoring and implement a hearing conservation program for employees whose exposure to cab noise equals or exceeds an 8-hour TWA of 85 dBA. This final rule became effective February 26, 2007.
- 49 CFR 229, Railroad Locomotive Safety Standards
- 229.121, Locomotive Cab Noise
Mine Safety and Health Administration (MSHA)
- Health Standards for Occupational Noise Exposure. (2000, September 13). A single source page for all documents and resources related to MSHA's 2000 Health Standards for Occupational Noise Exposure rule.
National Institute for Occupational Safety and Health (NIOSH)
- Occupational Noise Exposure. Publication No. 98-126, (1998, June). Includes revisions to previous 1972 recommendations that go beyond attempting to conserve hearing by focusing on preventing occupational noise-induced hearing loss.
US Coast Guard
- Recommendations on Control of Excessive Noise [94 KB PDF, 26 pages]. Navigation and Vessel Inspection Circular No. 12-82, (1982, June 2).
US Department of Defense (DoD)
- DoD Hearing Conservation Program [927 KB PDF, 40 pages]. Instruction No. 6055.12, (2010, December 3). Includes exposure limits and requirements for monitoring, control methods, hearing conservation programs, and more as part of the hearing conservation program.
US Department of Transportation (DOT), Federal Motor Carrier Safety Administration
- 49 CFR 393.94, Interior noise levels in power units
Consensus Standards and Recommendations from other Professional Organizations
Note: These are NOT OSHA regulations. However, they do provide guidance from their originating organizations related to worker protection.
American National Standards Institute (ANSI)
- A10.46-2007, Hearing Loss Prevention in Construction and Demolition Workers. Applies to all construction and demolition workers with potential noise exposures (continuous, intermittent and impulse) of 85 dBA and above.
- S3.1-1999 (R2008), Maximum Permissible Ambient Noise Levels for Audiometric Test Rooms. Specifies maximum permissible ambient noise levels (MPANLs) allowed in audiometric test rooms.
- S3.44-1996 (R2006), Determination of Occupational Noise Exposure and Estimation of Noise-Induced Hearing Impairment.
- S3.6-2010, American National Standard Specification for Audiometers. Includes specifications and tolerances for audiometers and standard reference threshold levels for audiometric transducers.
- S12.6-2008, Methods for Measuring the Real-Ear Attenuation of Hearing Protectors. Specifies laboratory-based procedures for measuring, analyzing & reporting passive noise-reducing capabilities of hearing protection devices.
- S1.4-1983 (R2006), American National Standard Specification for Sound Level Meters. Establishes performance and accuracy requirements for sound level meters.
- S1.25-1991 (R2007), American National Standard Specification for Personal Noise Dosimeters. Contains specifications for performance characteristics of personal noise dosimeters.
American Conference of Governmental Industrial Hygienists (ACGIH)
- ACGIH has established exposure guidelines for occupational exposure to noise in their Threshold Limit Values (TLVs) (85 dBA PEL with a 3 dBA exchange rate).
World Health Organization (WHO)
- Occupational exposure to noise: evaluation, prevention and control. World Health Organization. Provides an in depth look at all aspects of noise.
- Exposure Criteria, Occupational Exposure Levels [98 KB PDF, 24 pages]. Provides a detailed discussion of various criteria for measuring exposure limits to noise.
Accessibility Assistance: Contact the OSHA Directorate of Technical Support and Emergency Management at (202) 693-2300 for assistance accessing PDF materials.
*These files are provided for downloading.

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