MAGHFIROH, A. M. Sound absorption coefficient from composites made from coconut fiber, paper, and styrofoam . Journal of Energy, Mechanical, Material, and Manufacturing Engineering, [S. l.], v. 9, n. 1, 2024. DOI: 10.22219/jemmme.v9i1.32597. Disponível em: https://ejournal.umm.ac.id/index.php/JEMMME/article/view/32597. Acesso em: 13 nov. 2024.