VOIX, J.; HAGER, L. D.; ZEIDAN, J. Experimental validation of the objective measurement of individual custom earplug field performance. Canadian Acoustics, [S. l.], v. 34, n. 3, p. 30–31, 2006. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1807. Acesso em: 19 sep. 2021.