Document Type : Original Article
Authors
1 Department of Occupational Health, School of Public Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
2 MSc Student, Department of Occupational Health, Faculty of Health, Health Sciences Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
3 department of Occupational Health, School of Public HealthHamadan University of Medical ScienceHamadanIran
Abstract
Background and objective:Town Board Stations (TBS) installations with increment in gas consumption and overloading are one of the sources of noise pollution. The present study was aimed to assess and provide an occupational noise exposure control plan in TBS.
Methods:Area noise measurement and frequency analysis was performed according to ISO 9612(2009). After the determination of the range of sound pressure level, predominant source of noise was identified .
In addition, dosimetry was conducted to determine the personal exposure during a work shift. In the next step,acoustical analysis of TBS of the sample,construction was conducted based on acoustical absorbance properties. Installation of absorbent materials was recommended and the efficiency of the interventions was assessed.
Results:sound pressure level was in the range of 68.64 to 95.30 dB(A) in TBS. The minimum and maximum effective sound absorption of internal surfaces were 3.61 and 27.64 Sabine m2,respectively.
The average noise exposure dose for maintenance workers was 121%.After installation of absorbent materials on ceiling and walls, the effective sound absorption of the surfaces was improved to a maximum of 210.35 Sabine m2 and a minimum of 40.35 Sabine m2. The noise reduction prediction for these control plan will be 8.69 -11.6 dB(A).
Conclusions:The main reason of noise in the TBS was the passage and turbulence of gas flow in the mechanical unit, and reflective surfaces in constructions enclosing the installations. The control strategy, including the use of absorbent materials on ceiling and walls, was determined to reduce the sound pressure level to occupational exposure limit.
Keywords
- Nasiri P, Monazzam M, FarhangDehghan S, Jahangiri M. The Assessment Of The Environmental Noise And Personal Exposure In A Petrochemical Plant. Iran Occupational Health 2013;10(1):32-23.
- Golmohammadi R, Monazzam M, Nourollahi M, Nezafat A, Momen BellahFard S. Evaluation of noise propagation characteristics of compressors in tehran oil refinery center and presenting control methods. Journal of research in health sciences. 2010;10(1):22-30.
- Abbaspour M, Karimi E, Nassiri P, Monazzam M, Taghavi L. Hierarchical assessment of noise pollution in urban areas-A case study. Transportation Research Part D: Transport and Environment. 2015;34:95-103.
- Golmohammadi R, Giahi O, Aliabadi M, Darvishi E. An Intervention for Noise Control of Blast Furnace in Steel Industry. Journal of research in health sciences. 2014;14(4):90-287. PMID: 25503285.
- Goelzer B, Hansen CH, Sehrndt G. Occupational exposure to noise: evaluation, prevention and control: World Health Organisation; 2001
- Abbasi M, Monazzam Esmaielpour MR, Akbarzadeh A, Zakerian SA, Ebrahimi MH. Investigation of the effects of wind turbine noise annoyance on the sleep disturbance among workers of Manjil wind farm. Journal of Health and Safety at Work. 2015;5(3):51-62. eng.
- Golmohammadi R, Aliabadi M. Noise Pollution and its Irritating Effects in Hospitals of Hamadan, Iran. Health System Reserch. 2012; 7(6)
- Mattia GM, Bruel PV. Ergonomics of intern environments: privacy and reactions to noise
pollution. Journal of the Acoustical Society of America. 2008; 12 3(5):3811. - Cherminisoff P, Cherminisoff P. Industrial noise control. Michigan: Ann Environ Health. 2003;58(1): 55-8.
- Forouhar Majd F, Nasiri P, Ahmadvand M, F FM. Environmental noise pollution, oil and gas. Fifth Conference of Environmental Engineering: Tehran University; 2011.
- Tingay J, plc CR. meeting the challenges of employee noise exposure in the oil and gas industry,. 2003
- Fayzyan A, Reyhani A, Modares Razavi M, Meshkini P. Experimental study of noise pollution in urban gas pressure reduction stations. Sixth National Conference on Environmental Engineering: : Tehran University; 2012.
- .Khosravirad F, Zarei E, Mohammadfam I, Shoja E. Analysis of Root Causes of Major Process Accident in Town Border Stations (TBS) using Functional Hazard Analysis (FuHA) and Bow tie Methods. Journal of Occupational Hygiene Engineering. 2014;1(3):19-28.
- Hakimi E, Solimani P. Numerical study solutions to reduce the noise level in the gas pressure reduction stations within the city. Sixth National Conference on Environmental Engineering: Tehran University; 2012
- Golmohammadi R. Noise and Vibration Engineering. 4th ed. Tehran: Daneshjoo Publisher; 2014.
- Jahangiri M, Golmohammadi R, Aliabadi M. Determination of Main Noise Sources in a Thermal Power plant. J Health Safe Work.2014. 4(3):13-22.
- Hojati M, Golmohammadi R, Aliabadi M. Determining the Noise Exposure Pattern in a Steel Company. Journal of Occupational Hygiene Engineering. 2016;2(4):1-8.
- Masomi T, KHedri H, Razavi zade A. Evaluataion noise pollution in gas stations and provide solutions to reduce SPL noise sources. The fifth Conference of Environmental Engineering: Tehran University; 2011
- Forouharmajd F, Shabab M. Noise Pollution Status in a Metal Melting Industry and the Map of Its Isosonic Curve. Jundishapur J Health Sci. 2015;7(4):46-50. DOI: 10.17795/jjhs-30366
- RF، Barron. Industrial Noise Control and Acoustics. New York: Marcel Dekker; 2003
- Successful noise management in manufacturing. Australian Department of Consumer and Employment Protection. https://www.commerce.wa.gov.au/sites/default/files/atoms/files/ successful_noise_man.pdf February2006.
- Golmohamadi R, Aliabadi M, Darvishi E. Enclosure design for noise control of air blower in a typical steel industry. Iran Occupational Health Journal. 2014;11(2):1-12.
)