Santika, Viera Alvio, Yenni Darvina, Ratnawulan Ratnawulan, and Fadhila Ulfa Jhora. 2024. “Analysis of the Influence Mass Variations of Banana STEM Fibres With Polypropylene (PP) Matrix on Accoustic and Porosity Properties”. Journal of Experimental and Applied Physics 2 (2). https://doi.org/10.24036/jeap.v2i2.54.