Mohd Zubir MZI, Wan Abdul Rahman WMW. Alternative Soundproof Material to Reduce Noise HVAC Round Duct System (Rockwool and Bamboo Fiber). peat [Internet]. 2021 Jun. 22 [cited 2024 Jul. 18];2(1):683-9. Available from: https://penerbit.uthm.edu.my/periodicals/index.php/peat/article/view/722