Characterization of Sound Absorption Coefficient and Acoustic Impedance of Palm Frond Fiber Composites with Pine Resin on Various Composition Variations. Jurnal Teknik Mesin, [S. l.], v. 13, n. 1, p. 6–12, 2023. DOI: 10.21063/jtm.2023.v13.i1.6-12. Disponível em: https://jtm.itp.ac.id/index.php/jtm/article/view/725. Acesso em: 21 agu. 2025.