Aplicação da metodologia da dose semanal de ruído na caracterização da insalubridade de trabalhadores de uma molduraria e serralheria

Abstract

The exposure of workers to noise can sometimes be very harmful to your hearing. This work was based on a literature review, from the explanation of sound and units of measurements of the same, until the legal issues applicable to assessment of noise and the existence or not of Unhealthy relating to this physical agent. The objective of this study was to analyze the profiles of occupational noise exposure, using two different methodologies, on two workers of a Mounting frame and Locksmiths who had varying exposures to this agent, depending on the day's work. Initially were made in both workers, based on measurements by the proposed Noise Weekly Dose of American Conference of Industrial Hygienists (ACGIH, 2011), shortly after assessments were made based on the proposed Regulatory Standard NR-15, based on the methodology given by standard occupational Hygiene 01 (NHO01) from Fundacentro in order to demonstrate the presence or absence of Unhealthy assess whether occupational exposure to noise through an alternative method and uncommon practice. To perform the evaluations was used a Dosimeter Noise DOS-500 brand Instrutherm. For each worker, the method proposed by the ACGIH, measurements were carried out for seven consecutive days, as proposed by the NR-15 and NHO01 measurement was performed for six hours a day's work. As a result of research, it was found that for certain activities the proposed methodology by national standards cannot express truthfully the exposure profile of workers and, consequently, neither the presence or absence of Unhealthy. Thus became, in this case applying a justifiable international alternative methodology for evaluating the noise. After Unhealthy detected through use of the alternative method, measures have been proposed to mitigate the same, through the use of Personal Protective Equipment.