Mohd Azhar, Nor Azwa Yasmin, and Abdul Zaki Abdul Wahid. “Comparison of Natural Fibers As Acoustic Panels”. Progress in Engineering Application and Technology 2, no. 1 (June 16, 2021): 85–91. Accessed June 19, 2024. https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/997.