Penentuan Tingkat Penyerapan Bunyi Batang Pisang Yang Berbeda Jenis Menggunak…

Research has been conducted in order to determine sound absorption level from banana stem at different types as A1 (core banana of barangan), A2 (core banana of sweet), A3 (core banana of stone), A4 (The third mixture of core banana ) using the impedance tube is made of glass with size of 92 cm x 20 cm x 20 cm. Banana stem was used to processed into a square with size of 20 cm x 20 cm, the thic…