BEHAR, A. Hearing protectors testing and labeling - What’s new?. Canadian Acoustics, [S. l.], v. 31, n. 3, p. 80–81, 2003. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1560. Acesso em: 12 aug. 2022.