Annals of Tropical Medicine and Public Health
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ORIGINAL ARTICLE
Year : 2017  |  Volume : 10  |  Issue : 6  |  Page : 1740-1745

Evaluation of noise effects on standard threshold shift employees of technical and professional organization according to the audiogram and sound overall level measurement in Ilam: Across-sectionalstudy


1 Department of Occupational Health Engineering, Faculty of Health, Ilam University of Medical Sciences, Ilam, Iran
2 Department of Public Health, Ilam University of Medical Science, Ilam, Iran

Correspondence Address:
Nematullah Kurd
Department of Occupational Health Engineering, Faculty of Health, Ilam University of Medical Sciences, Ilam, Iran
Iran
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ATMPH.ATMPH_622_17

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Background: Noise is one of the most prevalent physically harmful factors in working environment which can cause many problems that one of them is hearing loss. Therefore, the aim of this study was to assess occupational exposure with sound(noise) in training workshops of Technical and Vocational Organization of Ilam and to determine the rate of change in hearing threshold of people working in these workshops. Materials and Methods: A cross-sectional study was carried out on 60 people which working in 8 workshops of Technical and Vocational Organization of Ilam which are selected by census report. Demographic data of studied people are collected using a researcher-made checklist and measuring the overall balance of sound level meter set model 450 is used. Changes in hearing threshold of people are assessed using audiometer. Finally, data are analyzed using SPSS 20 by conduct Spearman correlation and Pearson's correlation statistical tests in asignificant level of 0.05. Results: The results show that there have been 8.62dB change in hearing threshold of the left ear, 8.73dB in right ear, and 6.74dB in both ears of studied people averagely. The highest level of sound pressure balance is related to cutting-wood workshop, and the Equivalent exposure level(Leq) is more than national standard level(85dB) in mosaic, lapidary, and welding workshops. Spearman correlation test shows a significant relationship between the highest level of sound balance in welding workshop(112dB) and the average total loss(8.15dB) for both ears(P<0.05). Conclusion: According to the findings of this study, there is an urgent need for monitoring, assessing and control of other workshops of Ilam Technical and Vocational Organization to investigate the overall balance of sound and change in hearing threshold of people working in the workshops.


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