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Volume 5, Issue 2 (6-2019)
jhehp 2019, 5(2): 50-55 |
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Majidi F, Khosravi Y, Abedi K. Determination of the Equivalent Continuous Sound Level (Leq) in Industrial Indoor Space Using GIS-based Noise Mapping. jhehp 2019; 5 (2) :50-55
URL: http://jhehp.zums.ac.ir/article-1-218-en.html
URL: http://jhehp.zums.ac.ir/article-1-218-en.html
1- Department of Occupational Health and Safety Engineering, School of Public Health, Zanjan University of Medical Sciences, Zanjan, Iran.
2- Department of Environmental Science, School of Science, University of Zanjan, Iran.
3- Environmental health research center, Kurdistan University of medical sciences, Sanandaj, Iran.
2- Department of Environmental Science, School of Science, University of Zanjan, Iran.
3- Environmental health research center, Kurdistan University of medical sciences, Sanandaj, Iran.
Abstract: (9914 Views)
Background: The present study aimed to replace the integrated sound level meter by the noise map of a work environment in order to estimate the equivalent continuous sound level (Leq) as an important quantity in the noise monitoring of continuous noise sources.
Methods: In this theoretical-experimental study, the grid method was initially used. Sound pressure level (SPL) was measured at the selected stations in three noisy industrial halls. Data analysis was performed in ArcGIS 10.2 software, and the noise map was plotted for each hall separately. Afterwards, the different zones with various SPL intervals were calculated on each noise map, and Leq was determined. For the comparisons, Leq was also calculated using logarithmic equations, based on which the integrated sound level meters were programmed.
Results: The proposed method was highly accurate with the relative error of less than 2%. Furthermore, it decreased the number of mathematical operations 7-15 times compared to the conventional logarithmic method.
Conclusion: According to the results, the available GIS-based software could be accurately replaced by the routine Leq measurement hardware to estimate the Leq spatial noise in noisy industrial environments.
Methods: In this theoretical-experimental study, the grid method was initially used. Sound pressure level (SPL) was measured at the selected stations in three noisy industrial halls. Data analysis was performed in ArcGIS 10.2 software, and the noise map was plotted for each hall separately. Afterwards, the different zones with various SPL intervals were calculated on each noise map, and Leq was determined. For the comparisons, Leq was also calculated using logarithmic equations, based on which the integrated sound level meters were programmed.
Results: The proposed method was highly accurate with the relative error of less than 2%. Furthermore, it decreased the number of mathematical operations 7-15 times compared to the conventional logarithmic method.
Conclusion: According to the results, the available GIS-based software could be accurately replaced by the routine Leq measurement hardware to estimate the Leq spatial noise in noisy industrial environments.
Keywords: Equivalent sound level (Leq), Noise mapping, Geographic information system (GIS), Noise monitoring, Industrial indoor space
Type of Study: Original Article |
Subject:
Occupational and Industrial Health
Received: 2019/02/18 | Accepted: 2019/05/15 | Published: 2019/06/30
Received: 2019/02/18 | Accepted: 2019/05/15 | Published: 2019/06/30
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