I. A. Azhar and K. A. Mohd Sari, “Comparison of Sound Absorption Coefficient on Natural Fiber and Recycle Materials Panel”, peat, vol. 2, no. 1, pp. 225–233, Jun. 2021, Accessed: Jul. 18, 2024. [Online]. Available: https://penerbit.uthm.edu.my/periodicals/index.php/peat/article/view/800