Noise evaluation of MF285 tractor while pulling a trailer in an asphalt road

Tractors have been used for transportation on roads by many farmers in addition to use in the field operations. MF285 tractor is the popular kind of tractor in Iran (about 30% of all tractors) and almost this tractor has been used without cabin. Despite the problems caused by noise from the tractors and all its adverse effects on users and observers, no comprehensive research has been done on them. The result of this research indicate that the noise level of MF285 tractor, in 2,250 r/min engine speed, will be 90 dB(A) which in comparison with the standard value, 85 dB(A), is dangerous for operator's ears. The test site was prepared according to the international standards. The noise emitted by tractor in three gears (2, 3 and 4) and three speeds (1,500, 1,950 and 2,250 r/min) were measured and then analyzed statistically. Analysis of variance and Duncan's mean comparison test showed that the Sound Pressure Level (SPL) at the position of the driver in comparison to the observer position was statistically significant (P<0.01). Also, result showed the speed of engine has a pivotal role in the production of noise and should be investigated in different operations.

[1]  Malcolm J. Crocker,et al.  Handbook of Acoustics , 1998 .

[2]  Takashi Miyakita,et al.  ESTIMATES OF WORKERS WITH NOISE-INDUCED HEARING LOSS AND POPULATION AT RISK , 1997 .

[3]  R. H. Brown.  CRC handbook of engineering in agriculture , 1988 .

[4]  J. Matthews.  Measurements of environmental noise in agriculture , 1968 .

[5]  K C Parsons,et al.  Environmental ergonomics: a review of principles, methods and models. , 2000, Applied ergonomics.

[6]  Etienne Grandjean.  Fitting the task to the man , 1969 .

[7]  M. Behroozi Lar,et al.  Comparison of noise level of tractors with cab and without in different gears on driver ear and bystander , 2012 .

[8]  M. J. Crocker,et al.  Noise and vibration control in vehicles. , 1993 .

[9]  L Solecki.  Duration of exposure to noise among farmers as an important factor of occupational risk. , 2000, Annals of agricultural and environmental medicine : AAEM.

[10]  Carl J. Bern,et al.  Tractor Noise Exposure Levels for Bean-bar Riders , 1993 .

[11]  Çetin,et al.  The Health Consequences of Industrial Noise and Methods for Protection , 2008 .

[12]  Glen K. Martin,et al.  Noise-Induced Hearing Loss , 2010 .

[13]  Randall F. Barron,et al.  Industrial Noise Control and Acoustics , 2002 .

[14]  MAHMOUD OMID.  Current Status of Iranian Agricultural Mechanization , 2008 .

[15]  Mark S. Sanders,et al.  Human Factors in Engineering and Design , 2016 .

[16]  L Solecki.  Occupational hearing loss among selected farm tractor operators employed on large multiproduction farms in Poland. , 1998, International journal of occupational medicine and environmental health.

[17]  G. Herbison,et al.  Noise Exposure and Hearing Loss in Agriculture: A Survey of Farmers and Farm Workers in the Southland Region of New Zealand , 2003, Journal of occupational and environmental medicine.

[18]  Ali Aybek,et al.  Personal noise exposures of operators of agricultural tractors. , 2010, Applied ergonomics.

[19]  J. A. Lines,et al.  Noise in the Countryside , 1994 .