HUNG, T. Q.; HETU, R. A plan for acoustic signalling in industrial areas-criteria for the design of warning signals. Canadian Acoustics, [S. l.], v. 24, n. 2, p. 3–17, 1996. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/979. Acesso em: 28 mar. 2024.