Bubparenu, Nanthicha, Nikhom Laemsak, Ratchapak Chitaree, and Tanasri Sihabut. “Effect of density and surface finishing on sound absorption of oil palm frond”. Asia-Pacific Journal of Science and Technology 23, no. 4 (August 31, 2018): APST–23. accessed April 22, 2026. https://so01.tci-thaijo.org/index.php/APST/article/view/72352.