Abdul Khalid MSH, Nor Azali bin Azmir, Shahmir Hayyan bin Sanusi. Manipulating the Acoustic Characteristics of Kenaf as a Sound Absorber by Modifying the Thickness and Air Gap. IJIE. 2024;16(9):247-255. Accessed April 9, 2026. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/13957