The Effect of Different Fibre Length and Different Urea Formaldehyde (UF) content on Sound Absorption Performance of Empty Fruit Bunch (EFB)Ida Norfaslia Nasidi, Lokman Hakim Ismail, Emedya Murniwaty Samsudin, Muhamad Firdaus Abdul Khodir and Muhammad Aizat KamarozamanMATEC Web of Conferences, 150 (2018) 03003DOI: https://doi.org/10.1051/matecconf/201815003003