RAMAKRISHNAN, R. The inexpensive noise control method -a case study. Canadian Acoustics, [S. l.], v. 32, n. 3, p. 106–107, 2004. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1650. Acesso em: 8 dec. 2021.