Assessing Individual and Environmental Sound Pressure Level and Sound Mapping in Iranian Safety Shoes Factory

Zare, S and Hasheminejad, N and Elahi Shirvan, H and Hasanvand, D and Hemmatjo, R and Ahmadi, S (2018) Assessing Individual and Environmental Sound Pressure Level and Sound Mapping in Iranian Safety Shoes Factory. RJAV, XV (1). pp. 20-25.

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Abstract

Noise is regarded as a major physical hazard in work environments. The current study aimed at investigating environmental sound pressure level and sound mapping in an Iranian safety shoes production factory in 2017 using Surfer V.13. This cross-sectional, descriptive-analytical study was conducted among 3 units of a safety shoes production factor. Casella noise dosimeter (Cel-320) was used to measure individuals’ exposure to noise, while 450 Casella-Cel sound level meter (manufactured in England) was utilized to assess environmental sound pressure level. The collected data were then fed into Surfer V.13 to draw the isosonic map. The results of assessing individuals’ exposure showed that workers in the cutting, stitching, and stuffing unit had excessive exposure to noise (over 85.76 dB, which is the standard limit). The results of measuring environmental sound pressure level also showed that 32.3% of the measurement stations were located in the danger zone (with sound pressure levels greater than 85 dBA). The highest sound pressure levels measured in Lewis and lineage, injection, and cutting, stitching, and stuffing units were 88, 89, and 93 dB, respectively. Based on the obtained results, the cutting, stitching and stuffing is in dire need of engineering controls and working, trafficking, and stopping limitations.

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