ISMAIL, MUHAMMAD IFFZAN IMAN, and LATIFAH MD ARIFFIN. 2022. “Finding Sound Absorption Coefficients On Porous Absorber Material by Using COMSOL Simulation and Impedance Tube Method”. Research Progress in Mechanical and Manufacturing Engineering 2 (2): 1069-78. https://publisher.uthm.edu.my/periodicals/index.php/rpmme/article/view/4861.