Purwanto, Budi, Melania Hanny Aryantie, Zulfachmi Zulfachmi, and Rina Aprishanty. “Low-Cost and Portable Sound Reduction Box: Innovation for Acoustic Material Performance Measurement”. Journal of Engineering and Technological Sciences 52, no. 5 (September 30, 2020): 732-744. Accessed October 20, 2025. https://journals.itb.ac.id/index.php/jets/article/view/12487.