Enos Lolang, Israel Padang, Intan Duru’ Sarungallo, Jumiarti Andi Lolo and Adewidar Marano Pata’dungan 2022. Identification of the Utilization of Jember Coffee Skin Biocomposite (Coffea Canephora) as a Sound Absorber Using the Tube Method. Jurnal Multidisiplin Madani. 2, 12 (Dec. 2022), 4229–4237. DOI:https://doi.org/10.55927/mudima.v2i12.2051.