“Analysis of the Efficiency of Hearing Protectors to Sound Pressure Levels Applied in Mechanical Manufacturing Processes of a PIM company (119-130)”, JETIA, vol. 4, nº 15, p. 119–130, set. 2018, Acesso em: 23º de outubro de 2026. [Online]. Disponível em: https://itegam-jetia.org/journal/index.php/jetia/article/view/368