APPROXIMATED EVALUATION OF A RIGID ACOUSTIC CAVITY COUPLED ON A FLEXIBLE BOARD IN A FREE VIBRATION. Revista Interdisciplinar de Pesquisa em Engenharia, [S. l.], v. 2, n. 35, p. 79–96, 2017. DOI: 10.26512/ripe.v2i35.21418. Disponível em: https://periodicostestes.bce.unb.br/index.php/ripe/article/view/21418. Acesso em: 7 jan. 2026.