Azhar, Imran Asyraf, and Kamarul Aini Mohd Sari. “Comparison of Sound Absorption Coefficient on Natural Fiber and Recycle Materials Panel”. Progress in Engineering Application and Technology 2, no. 1 (June 16, 2021): 225–233. Accessed February 21, 2024. https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/800.