Tan, Wei-Hong, Hun-Guan Chuah, Ee-Meng Cheng, Eng-Aik Lim, and Chip- Hao Lok. “In-Situ Noise Measurement and Analysis for the Motorcycle Muffler”. International Journal of Integrated Engineering 12, no. 8 (August 9, 2020): 44–53. Accessed May 19, 2024. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/5498.