:: Volume 2, Issue 2 (summer 2016) ::
3 2016, 2(2): 108-115 Back to browse issues page
Noise Reduction Using Technical and Engineering Measures in Welding Unit of a Water Heater Manufacture Plant in Tehran
H Irvani , B Saranjam , H Mohammadpour , R Nourian , M Kangavari , H Shojaee
Abstract:   (707 Views)

Background & aim: Noise is one of the important problems in the environment and workplaces. Noise control by different methods is one of the methods to reduce harmful effects of this phenomenon. This study aimed to reduce noise level in welding unit of an industrial plant with the use of technical and engineering designs.

Methods: Noise levels were measured using ISO 9612 method to investigate feasibility of effective noise control methods application in the welding unit. Interventions such as; enclosing a press machine, removing a air compressor, flooring, and putting expansive accumulator on output of storage tanks leaking testing machine were applied after identifying main noise sources using the by measurement results.

Results: The results before interventions showed that in 35 out of 60 stations the noise levels were higher than the occupational exposure limits (OEL). Approximately 58% of the workstations were in the dangerous and 42% in alarming levels before the intervention. Mean SPL and allowable exposure time in welding unit were 105.12 dB and less than 15 minutes, respectively. After implementing control measures all the stations remained in the alarming level and the average SPL decreased to 84.7 dB and allowable exposure time enhanced to 8 hours.

Conclusion: The results showed that technical and engineering measures have a major role on noise reduction to alarming levels.

Keywords: : Noise, Sound Pressure Level, Noise Map, Noise control
Full-Text [PDF 476 kb]   (282 Downloads)    
Type of Study: Research | Subject: General
Received: 2017/06/21 | Accepted: 2017/06/21 | Published: 2017/06/21

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Volume 2, Issue 2 (summer 2016) Back to browse issues page