M. I. I. ISMAIL and L. . MD ARIFFIN, “Finding Sound Absorption Coefficients On Porous Absorber Material by Using COMSOL Simulation and Impedance Tube Method”, rpmme, vol. 2, no. 2, pp. 1069–1078, Jan. 2022, Accessed: May 02, 2024. [Online]. Available: https://publisher.uthm.edu.my/periodicals/index.php/rpmme/article/view/4861