BRAMMER, A.; PAN, G. Opportunities for active noise control in communication headsets. Canadian Acoustics, [S. l.], v. 26, n. 3, p. 32–33, 1998. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1143. Acesso em: 26 oct. 2021.