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://rsdjournal.org/rsd/article/view/982. Acesso em: 5 dec. 2025.