RAMAKRISHNAN, R. Effect of perforated sheets on rectangular silencer performance. Canadian Acoustics, [S. l.], v. 21, n. 3, p. 119–120, 1993. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/803. Acesso em: 29 mar. 2024.