Sulaiman MS, WAN ABDUL RAHMAN WMW. Study of Potential of Polyethylene Foam as Sound Insulation for HVAC Rectangular Duct. peat [Internet]. 2021 Jun. 22 [cited 2026 Aug. 15];2(1):779-86. Available from: https://periodical.uthm.edu.my/index.php/peat/article/view/716