Identification of the Utilization of Jember Coffee Skin Biocomposite (Coffea Canephora) as a Sound Absorber Using the Tube Method

Enos Lolang; Israel Padang; Intan Duru’ Sarungallo; Jumiarti Andi Lolo; Adewidar Marano Pata’dungan

doi:10.55927/mudima.v2i12.2051

Authors

Enos Lolang Universitas Kristen Indonesia Toraja
Israel Padang Universitas Kristen Indonesia Toraja
Intan Duru’ Sarungallo Universitas Kristen Indonesia Toraja
Jumiarti Andi Lolo Universitas Kristen Indonesia Toraja
Adewidar Marano Pata’dungan Universitas Kristen Indonesia Toraja

DOI:

https://doi.org/10.55927/mudima.v2i12.2051

Keywords:

Sound Attenuation Coefficient, Acoustic Material, Coffee Skin

Abstract

The development of technology and information is in line with the era of society 5.0 which occurs in various fields, especially in terms of infrastructure which of course will lead to high mobility. One of the negative impacts that arise is noise. For that we need a material that can be used as an acoustic material that functions to absorb sound. Coffee waste is one of the agricultural wastes that can be used as an acoustic material. The purpose of this study was to determine the effect of the sound damping coefficient on sound intensity and the mixture of filler and matrix mass fractions that can be used to muffle sound. The tube method with the Sound Level meter feature from Smartphone will be used to determine the value of the sound attenuation coefficient. In this study, the sound intensity used was 60-100 dB, with a mass ratio of filler and matrix used was 80%:20%, 70%:30%, 60%:40%, 50%:50% and the thickness used is 10mm. The results of the study show that an increase in intensity for each sample will show a decreasing coefficient for each sample. This is due to the higher the intensity of the sound, the higher the sound energy will also be greater so that it is more difficult for the sample to absorb

References

Danu, I. W. (2019). (Peer Review+ Similarity+ Document) Karakteristik Kulit Kopi Robusta Hasil Samping Pengolahan Metode Kering Dari Perkebunan Kopi Rakyat Di Jawa Timur. Jurnal Agritop, 17(2), 214-223.

Dong, C., Davies, I. J., Fornari Junior, C. C. M., & Scaffaro, R. (2017). Mechanical properties of Macadamia nutshell powder and PLA bio-composites. Australian Journal of Mechanical Engineering, 15(3), 150-156.

Sagitta, J. N., Sugita, I. K. G., & Kencanawati, C. I. P. K. (2017). Variasi ketebalan panel green komposit terhadap koefisien serap bunyi komposit serabut kelapa (cocos nuciferal) dengan perekat getah pinus (pinus merkusii). Teknik Desain Mekanika, 6(4), 318-322.

Safitra, E. R., & Herlina, I. (2020). Pembuatan film plastik biodegradable dari limbah kulit kopi dengan penambahan kitosan/gliserol. Journal of Science and Applicative Technology, 4(1), 38-42.

Firman, F., Hasbi, M., & Aksar, P. (2018). Studi Eksperimen Kekuatan Mekanik Daun Nanas Hutan Dengan Metode Pengujian Tarik. Enthalpy, 3(1).

Novita, E., Fathurrohman, A., & Pradana, H. A. (2018). Pemanfaatan kompos blok limbah kulit kopi sebagai media tanam. AGROTEK: Jurnal Ilmiah Ilmu Pertanian, 2(2), 61-72.

Daning, D. R. A., & Karunia, A. D. (2018). Teknologi Fermentasi Menggunakan Kapang Trichoderma sp untuk Meningkatkan Kualitas Nutrisi Kulit Kopi sebagai Pakan Ternak Ruminansia. Agriekstensia: Jurnal Penelitian Terapan Bidang Pertanian, 17(1), 70-76.

Azwar A.B. 2012. Intensifikasi kopi jadi program unggulan baru. Media Perkebunan, 99, 16-17.

Corro, G., Panigua, L., Pal, U., Banuelos, F., Rosas, M., 2013,“Generation of Biogas from Coffe Pulp and CowDung Co-Digestion: Infrared studies of postcombustio emission”, Energy Conversion and Management.

Pamungkas, A. (2011). Studi Sifat Mekanik dengan Pengujian Tarik dan Ketangguhan Retak pada Komposit Epoxy-Kaolin. MeTrik Polban, 5(01), 1-1.

Pawestri, A. K. R., Hasanah, W., & Murphy, A. (2018). Studi Karakteristik Komposit Sabut Kelapa Dan Serat Daun Nanas Sebagai Peredam Bunyi. Jurnal Teknologi Bahan Alam, 2(2), 112-117.

Yuliantika, S. dan Elvaswer., Penentuan Koefisien Absorpsi dan Impedansi Material Akustik Resonator Panel Kayu Lapis (Plywood) Berlubang dengan Menggunakan Metode Tabung, Jurnal Ilmu Fisika, 7(2), hal 56-62 (2015).

Nabila, N., & Mahyudin, A. (2020). Pengaruh Ketebalan Pelepah Pisang terhadap Koefisien Absorpsi Material Akustik. Jurnal Fisika Unand, 9(2),244-249