HODGSON, M.; REMPEL, R.; PARK, E. Measurement of Typical Speech and Background-Noise Levels in University Classrooms During Lectures. Canadian Acoustics, [S. l.], v. 24, n. 3, p. 12–12, 1996. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/987. Acesso em: 15 jul. 2024.