Effect of Fibres Length on Acoustic Properties of Betel Nut Husk (Areca Nut Husk) Fibers–Reinforced Epoxy Composites. JTM [Internet]. 31 Oktober 2019 [dikutip 10 September 2025];9(2):46-51. Tersedia pada: https://jtm.itp.ac.id/index.php/jtm/article/view/532