Characterization of noise emitted by a low-profile tractor and its influence on the health of rural workers.

Autor: Santos LMD; Federal University of Lavras, Department of Agricultural Engineering, Av. Aquenta Sol, 37200-900 Lavras, MG, Brazil., Ferraz GAS; Federal University of Lavras, Department of Agricultural Engineering, Av. Aquenta Sol, 37200-900 Lavras, MG, Brazil., Batista ML; Federal University of Lavras, Departament of Water Resources in Agricultural Systems, Av. Aquenta Sol, 37200-900 Lavras, MG, Brazil., Martins FBS; Technological Center, St. Fernando Matos, 58, Barra da Tijuca, 22621-090 Rio de Janeiro, RJ, Brazil., Barbosa BDS; Federal University of Lavras, Department of Agricultural Engineering, Av. Aquenta Sol, 37200-900 Lavras, MG, Brazil.
Jazyk: angličtina
Zdroj: Anais da Academia Brasileira de Ciencias [An Acad Bras Cienc] 2020 Nov 11; Vol. 92 (3), pp. e20200460. Date of Electronic Publication: 2020 Nov 11 (Print Publication: 2020).
DOI: 10.1590/0001-3765202020200460
Abstrakt: Noise is one of the main physical agents in the rural work environment and it can be harmful to the health of workers exposed to it. Thus, research on the spatialization of noise emitted by agricultural machinery can help minimize harmful health effects. This study sets out to evaluate the spatial distribution of the noise emitted by an agricultural tractor with and without the activation of a rotary cutter. A wave model geostatistical analysis was used to identify healthy working zones according to current legislation. The experiment was carried out using a 75 hp tractor at 2000 rpm with the rotary cutter on the on and off modes. A digital sound level meter was used to register noise in a regular 2.0 x 2.0 m sample mesh within a 10-meter radius. The semivariogram was adjusted using the weighted least squares method, wave model and kriging interpolation to obtain the maps. The magnitude and spatial structure of the noise emitted by the tractor were identified. The results show that the equipment produced noise levels above the limits recommended by Brazilian regulatory standard NR 15. Thus, both the machine operator and the workers involved in the operation should use Personal Protective Equipment.
Databáze: MEDLINE
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