A proposal of a digital learning object for the teaching of sound waves. Research, Society and Development, [S. l.], v. 8, n. 6, p. e586982, 2019. DOI: 10.33448/rsd-v8i6.982. Disponível em: https://ojs34.rsdjournal.org/index.php/rsd/article/view/982. Acesso em: 29 jun. 2025.