KOTARBIŃSKA, E.; KOZŁOWSKI, E.; MŁYŃSKI, R. Objective tests and the assessment of the acoustic properties of ear-plugs. Archives of Acoustics, [S. l.], v. 31, n. 4(S), p. 275–280, 2014. Disponível em: https://acoustics.ippt.pan.pl/index.php/aa/article/view/1356. Acesso em: 6 jul. 2025.