BIRNBACH, M.; ŚLIWIŃSKI, A.; ZACHARA, S. Acoustic impedance variations of Helmholtz resonators of two plates with orifices inlet neck against the distance between the plates. Archives of Acoustics, [S. l.], v. 29, n. 2, 2004. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/473. Acesso em: 26 apr. 2025.