Muhammad, A.A., Salim, A. and Marasabessy, F. 2017. The Application of Acoustic Material Egg Tray as Noise Absorbers in the Interior of Elementary School Classroom. MITRA: Jurnal Pemberdayaan Masyarakat. 1, 1 (Nov. 2017), 18–31. DOI:https://doi.org/10.25170/mitra.v1i1.11.