Golmohammadi Rostam, Giahi Omid, Aliabadi Mohsen, Darvishi Ebrahim
Department of Occupational Hygiene, School of Public health and Research Centre for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran.
Kurdistan Environmental Health Research Center, Department of Occupational Health, Faculty of Health, Kurdistan University of Medical Sciences, Sanandaj, Iran.
J Res Health Sci. 2014 Autumn;14(4):287-90.
Noise pollution is currently a major health risk factor for workers in industries. The aim of this study was to investigate noise pollution and implement a control intervention plan for blast furnace in a steel industry.
The measurement of sound pressure level (SPL) along with frequency analysis was done with the sound-level-meter Cell-450. Personal noise exposure was performed using dosimeter TES-1345 calibrated with CEL-282. Before planning noise controls, acoustic insulation properties of the furnace control unit and workers' rest room were assessed. Control room and workers' rest room were redesigned in order to improve acoustical condition.
The SPL before intervention around the Blast Furnace was 90.3 dB (L) and its dominant frequency was 4000 Hz. Besides, noise transmission loss of the control and rest rooms were 10.3 dB and 4.2 dB, respectively. After intervention, noise reduction rates in the control and rest rooms were 27.4 dB and 27.7 dB, respectively. The workers' noise dose before and after the intervention was 240% and less than 100%, respectively.
Improvement the workroom acoustic conditions through noise insulation can be considered effective method for preventing workers exposure to harmful noise.
噪声污染目前是工业行业工人面临的主要健康风险因素。本研究旨在调查某钢铁行业高炉的噪声污染情况并实施控制干预计划。
使用声级计Cell - 450进行声压级（SPL）测量及频率分析。使用经CEL - 282校准的TES - 1345剂量计进行个人噪声暴露测量。在规划噪声控制措施之前，评估了高炉控制单元和工人休息室的隔音性能。对控制室和工人休息室进行了重新设计以改善声学条件。
干预前高炉周围的声压级为90.3 dB（L），其主频为4000 Hz。此外，控制室和休息室的噪声传输损失分别为10.3 dB和4.2 dB。干预后，控制室和休息室的降噪率分别为27.4 dB和27.7 dB。干预前后工人的噪声剂量分别为240%和小于100%。
通过隔音改善工作室声学条件可被视为预防工人接触有害噪声的有效方法。
