Elaboração de mapa de ruído emitido pelo funcionamento de elevadores agrícolas

Abstract

The present work had as objective to elaborate the encironmental noise map, emitted by the operation of grain conveyors: agricultural elevators, as components of the seed processing machinery, inside a Grau and Seed Processing Unit, locater at the Farroupilha Federal Institute – Alegrete Campus. The samples were taken with Instruterm brand NPS (Soud Pressure Level) meter, wuth 1,5 dB accuracy, duly calibrated and certified. The date of the operation of the agricultural elevators were collected considering the standardization of the referencia height (worker’s hearing zone), in squade mesh 3m x 3m. After tabulation of data in a spreasheet, a colorimetric map was generated in the Surfer softwaere of the NPS collected in the reference UBS, in order to know the safest places and the time limit of exposure to noise in the local house. Therefore, we concluded that in the interior os the reference UBS it is necessary to use PPE (Individual Protection Equipament) in every area, because the lowest NPS collected was 88,5 dB and NR 15 tells us that the acoustically safe NPS is up to 85 dB. In addition, collections were made at the UBS referencia office and in the mechanization workshop, in order to demonstrate the influence of agroindustrial noise also in locations outside the UBS.