ASTOLFI, A. Trajectories in Classroom Acoustics: Vocal Behavior of Teachers. Canadian Acoustics, [S. l.], v. 47, n. 1, p. 87–90, 2019. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3281. Acesso em: 16 aug. 2022.