Volume 5, Number 3 (9-2015)                   JHSW 2015, 5(3): 21-28 | Back to browse issues page


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Arefian I, Asady H, Monazam Esmaielpour M R, zolghadr Z, Zarif Yeganeh M. Investigating impact of motor oil quality on vehicles engine induced noise level. JHSW. 2015; 5 (3) :21-28
URL: http://jhsw.tums.ac.ir/article-1-5300-en.html

1- BSc, Department of Occupational Health Engineering, Faculty of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
2- Professor, Department of Occupational Health Engineering, Faculty of Public Health, University of Medical Sciences, Tehran, Iran. , mmonazzam@hotmail.com
3- BSc, Department of Biostatistics, Faculty of Paramedical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
4- PharmD-MPH Student of School of Public Health, Tehran University of Medical Sciences and Health Services, Tehran, Iran.
Abstract:   (3761 Views)

Introduction: Vehicle engine id one of the main sources of noise which its level is influenced by various parameters. The aim of this study was to investigate the impact of motor oils quality before and after oil change on the variability of vehicle engine induced noise level. In this study it is tried to follow-up the efficacy of motor oil quality on engines sound level.

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Material and Method: First, engine noise of 94 vehicles were recorded for 30 seconds before and after oil change and all the vehicles technical information including mileage, type of motor oil, and type of vehicle were registered. Following, the recorded noises were calibrated in semi-anechoic chamber and the sound pressure levels were measured with A and C-weighting network and main octav bands, using a sound level meters. The obtained results analyzed using SPSS software version 17.

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Results: The effects of motor oil quality on different noise levels of engines were determined and a significant reduction in noise level of vehicles engine was observed. Investigation of the relationship between mileage and motor oil quality on various engines sound level manifested that vehicles with mileage ranged 100000-150000 miles had significant reduction in their sound pressure levels in comparison with other vehicles.

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Conclusion: The results revealed that engine oil is among factors reducing the vehicle engine induced noise level. Moreover, the engine oil type and the vehicle mileage are key variables which determine the impact of engine oil quality on reduction of the sound level of vehicles engine.

Full-Text [PDF 310 kb]   (1551 Downloads)    
Type of Study: Research | Subject: Special
Received: 2015/09/7 | Accepted: 2015/09/7 | Published: 2015/09/7

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