Hamdan NI, Zainulabidin MH, Kasron MZ, Mohd Kassim AS, Ismail AE. Effect of Perforation Size on Sound Absorption Characteristics of Membrane Absorber. ijie [Internet]. 2018 Sep. 3 [cited 2023 Dec. 12];10(4). Available from: https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/2335