NAFAA, F. The Broadband low-frequency sound absorption via a hexagonal acoustic metamaterial in the honeycomb structure: DOI: 10.48129/kjs.16701. Kuwait Journal of Science, [S. l.], v. 49, n. 4, 2022. DOI: 10.48129/kjs.16701. Disponível em: https://journalskuwait.org/kjs/index.php/KJS/article/view/16701. Acesso em: 21 apr. 2026.