Extrapolation of Experimental Field Study to a National Occupational Noise Exposure Standard


Proposing a Noise Standards should be considered seriously by the governmental authorities because of the prevalence of hazardous noise exposure and the seriousness of the effects. In a survey founded by World Health Organization’s regional office in Iran, the existing as well as gathered data from field were applied to propose a National Occupational Noise Exposure Limit. The collected data plus the existing data were processed to: propose a national occupational noise exposure limit and depict the major restrictions in application of existing field data in proposing a national occupational noise exposure limit.Results obtained from the present study shows that the occupational noise levels of 90 to 95 dBA can lead to hearing losses greater than 25 dBA. It was shown that occupational noise levels of 85 to 90 dBA would not lead to hearing losses greater than 20 dBA. The comparison of hearing losses shows that the noise levels of less than 80 dBA will not lead to any significant hearing loss. It was deduced that 85 dBA can be recommended for a national occupational noise limit in Iran. The study also showed that the application of existing field data to recommend a national occupational noise standard may have some restrictions.

Ed Nykaza TF. Smart Hearing Protector for Reducing Noise-Induced Hearing Loss. J Acoust Soc Am 2003; 114(4): 2331- 2337.

Lund SP, Jepsen GB and Simonsen L. Effect of long-term, low-level noise exposure on hearing thresholds, DPOAE and suppression of DPOAE in rats. Noise Health, 2001. 3(12): 33-42.

Ising H, and Braun C. Acute and chronic endocrine effects of noise: Review of the research conducted at the Institute for Water, Soil and Air Hygiene. Noise Health, 2000; 2(7): 7-24.

Babisch W. The Noise/Stress Concept, Risk Assessment and Research Needs. Noise Health, 2002; 4(16): 1-11.

Henderson D, Morata TC, and Hamernik RP. Considerations on assessing the risk of work-related hearing loss. Noise Health, 2001; 3(10): 33-75.

NIOSH, Criteria for a Recommended Standard: Occupational Exposure to Noise, U.D.o.H.a.H. Service, Editor. 1972, NIOSH.

OSHA, Criteria for a Recommended Standard, Occupational Exposure to Noise, Revised Criteria, U.S.D.o. Labor, Editor. 1980, Occupational Safety & Health Administration.

OSHA, OSHA's Occupational Noise Exposure 1910.95 Code of Federal Regulations, U.D.o. Labor, Editor. 1995, OSHA. 200-213.

OSHA, Criteria for a recommended standard, Occupational Noise Exposure, Revised Criteria, U.S.D.o. Labor and O.S.H. Administration, Editors. 1998, Occupational Safety & Health Administration.

NIOSH, Criteria for a Recommended Standard for Occupational Noise Exposure, U.D.o.H.a.H. services, Editor. 1996, Centers for Disease Control and Prevention.

NIOSH, Criteria for a Recommended Standard--Occupational Noise Exposure, U.D.o.H.a.H. Services, Editor. 1998, NIOSH.

Starck J, Toppila E, and Pyykko I. Impulse noise and risk criteria. Noise Health, 2003. 5(20): 63-73.

Karimi A, Nasiri S, Khodaparast F, Oliaee M. Noise Induced Hearing Loss Risk assessment in Truck Drivers, Noise Health 2010, 12(46): 49-55.

American National Standards Institute, Specification for Audiometers, ANSI Editor., American National Standards of the Acoustical Society of America. 1996: 38.

Majumder J, Mehta CR, and Sen D. Excess risk estimates of hearing impairment of Indian professional drivers. Int J Ind Ergon 2009. 39(1): 234-238.

David A, Bies CHH. Engineering Noise Control Theory and Practice. third ed, ed. T.F. Group. 2003, London: Spon Press.

IssueVol 2 No 2 (2010) QRcode
Occupational Noise PEL (Permissible Exposure Limit) Field Data Hearing Loss Noise Standard Iran

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How to Cite
Jafari MJ, Karimi A, Haghshenas M. Extrapolation of Experimental Field Study to a National Occupational Noise Exposure Standard. Int J Occup Hyg. 1;2(2):63-68.