EXPERIMENTAL INVESTIGATION OF AN ACOUSTIC METAMATERIAL BARRIER DESIGN COMPOSED OF A SQUARE PRISM WITHIN A HEXAGONAL RECESS. ASEAN Engineering Journal, [S. l.], v. 11, n. 3, p. 57–70, 2021. DOI: 10.11113/aej.v11.16872. Disponível em: https://journals.utm.my/aej/article/view/16872.. Acesso em: 2 may. 2024.