Lawanwadeekul, Siwat, Pincha Torkittikul, Soravich Mulinta, Thitima Khunyotying, Winai Tasang, and Mattika Bunma. 2023. “Effect of Size and Amount of Lightweight Expanded Clay Aggregate on Normal Incidence Sound Absorption Coefficient of Concrete”. Engineering and Applied Science Research 50 (3):195-201. https://ph01.tci-thaijo.org/index.php/easr/article/view/250823.