GASTMEIER, W. J. Teaching Concepts of Acoustical Waves in Air - Part 2. Canadian Acoustics, [S. l.], v. 51, n. 3, p. 92–93, 2023. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/4125. Acesso em: 18 may. 2026.