Análise do ruído em picador de madeira: um estudo de caso

Abstract

One of the main physical agents that cause unhealthy in the workplace is the noise, continuous exposure to uncontrolled and this causes damage and hearing disorders. The main equipment for producing wood chips is the chipper. The operation of the chipper produces loud noise in the work environment not always mitigated effectively. That said this study aims to assess the level of noise to which workers are exposed to operate this equipment, checking the exposure limits of 15 and NR - 01 NHO standards, the ability to perform daily 8-hour workday. For the measurements of the levels of noise dosimeters two identical devices were used and simultaneously set on slow response with duplicity factor 3 to 01 NHO and factor 5 for the NR - 15. Protectors provided to employees attenuate 13 dB (A) (NRRsf) and through the measurements, it was found that they are effective in their roles. To the front of the NR-15 measurement average noise level of 94.6 dB (A) and NHO 91.92 01 dB (A) was observed by reducing these amounts absorbed respectively to 81.6 dB (A) and 78.92 dB (a) considering use of hearing protection. So the company workers can operate the chipper for eight hours a day while using hearing protection.