SOUND FREQUENCY SPECTRUM VERSUS LENGTH OF CLOSED ORGAN PIPES. Journal Akustika, [S. l.], v. 48, n. 48, p. 22–26, 2025. DOI: 10.36336/akustika20254821. Disponível em: https://journalakustika.com/index.php/akustika/article/view/170. Acesso em: 16 apr. 2025.