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2023. Characterization of Sound Absorption Coefficient and Acoustic Impedance of Palm Frond Fiber Composites with Pine Resin on Various Composition Variations. Jurnal Teknik Mesin. 13, 1 (Apr 2023), 6–12. DOI:https://doi.org/10.21063/jtm.2023.v13.i1.6-12.