Noise pollution is one of the common physical harmful factors in many work environments. The current study aimed to assess personal and environmental sound pressure level and project the sound map of an Iranian tire manufacturing complex using Surfer V.14 and Noise at work.This study adopted a cross-sectional, descriptive, analytical design and was conducted in the curing hall (including curing, sandblast, and trimming units) of a tire factory in 2017. Following ISO 9612:2009, Casella Cel-320 was used to measure personal sound pressure level, while CEL-450 sound level meter (manufactured by Casella-Cel, the UK) was employed to assess environmental sound pressure level. The sound and isosonic maps were projected using Surfer V. 14 and Noise at work.The results of assessing personal sound pressure level indicated that the highest received dose (147.49%) and personal equivalent sound level (87.13 dBA) were recorded for workers in the curing unit. Indeed, the received dose of these workers was 1.48 times greater than the standard limit. The results of measuring environmental sound pressure level also revealed that, out of 101 measurement stations in the curing unit, 76 stations (75.25%) were regarded as danger areas (over 85 dBA), while 25 stations (24.75%) were considered as caution areas (65-85 dBA). The lowest and highest sound pressure levels in this unit respectively were 81.7 dBA and 92.8 dBA. Over 75% of the curing hall had a sound pressure level greater than 85 dBA. Furthermore, the curing unit was found to be the most dangerous area in terms of noise pollution. It is therefore necessary to implement noise control measures, apply hearing conservation program, and conduct auditory tests among workers in this unit.
کلید واژگان :sound pressure level, personal sound, environmental sound, Surfer, Noise at work, Iran
ارزش ریالی : 300000 ریال
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