“Analysis of the Efficiency of Hearing Protectors to Sound Pressure Levels Applied in Mechanical Manufacturing Processes of a PIM Company (119-130)”. ITEGAM-JETIA 4, no. 15 (setembro 30, 2018): 119–130. Acesso em outubro 23, 2026. https://itegam-jetia.org/journal/index.php/jetia/article/view/368.