PENGUJIAN KOEFISIEN ABSORBSI DARI MATERIAL AKUSTIK SERAT ALAM LIMBAH AMPAS TEMPE UNTUK PENGENDALI KEBISINGAN

Authors

  • Irene Wijaya Jurusan Fisija FMIPA Universitas Andalas Kampus Unand, Limau Manis, Padang, 25163
  • Elvaswer - Jurusan Fisija FMIPA Universitas Andalas Kampus Unand, Limau Manis, Padang, 25163

DOI:

https://doi.org/10.25077/jfu.4.2.%25p.2015

Abstract

ABSTRAK

Penelitian untuk menentukan koefisien absorbsi bunyi menggunakan metode tabung pada komposit berbahan dasar serat alam limbah ampas tempe dan matriks lem PVAc telah dilakukan. Sampel material komposit dibuat dari massa serat dan matriks yang berbeda-beda. Range frekuensi yang digunakan pada penelitian ini yaitu  500 Hz, 1000 Hz, 2000 Hz, 4000 Hz dan 8000 Hz. Hasil penelitian ini menunjukkan bahwa koefisien absorpsi bunyi terendah pada frekuensi 2000 Hz yakni 0,419 dimiliki oleh sampel dengan komposisi serat 32,5 g dan matriks 27,5 g. Koefisien absorbsi tertinggi diperoleh pada frekuensi 1000 Hz yakni 0,96 dengan komposisi serat 40 g dan matriks     20 g. Serat limbah ampas tempe ini sangat cocok digunakan pada ruangan audio karena memiliki koefisien absorbsi yang cukup tinggi pada frekuensi 1000 Hz. Koefisien absorbsi meningkat jika jumlah serat ditambah.

Kata kunci : absorbsi, serat alam, matriks, metode tabung, frekuensi

ABSTRACT

Research to determine the sound absorption coefficient with tube method of composite from fermented soybean  waste natural fiber with PVAC glue matrix has been done. Inside that composite material has been given various fiber mass and matrix for every sample. Range of frequency used in this research are 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz and 8000 Hz. The results of this research showed that the lowest sound absorbtion coefficient at 2000 Hz frequency thai is 0.419 with fiber composition of 32.5 g and matrix of 27.5 g. The highest sound absorbtion coefficient obtained at 1000 Hz frequency that is 0.96 with fiber composition of the highest sound absorbtion coefficient obtained at 1000 Hz frequency that is 0.96 with fiber composition of 40 g and matrix of 20g. This fiber is compatible and recomeended to be used at audio room. Because it has higher absorbtion coefficient at 1000 Hz frequency. Absorbtion coefficient will rise up if more fiber added into.

Keywords : absorbtion, natural fiber, matrix, tube method, frequency 

Downloads

Published

2024-10-26

How to Cite

Wijaya, I., & -, E. (2024). PENGUJIAN KOEFISIEN ABSORBSI DARI MATERIAL AKUSTIK SERAT ALAM LIMBAH AMPAS TEMPE UNTUK PENGENDALI KEBISINGAN. Jurnal Fisika Unand, 4(2). https://doi.org/10.25077/jfu.4.2.%p.2015

Issue

Vol. 4 No. 2: April 2015

Section

Articles

License

Copyright (c) 2024 Irene Wijaya, Elvaswer -

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Please find the rights and licenses in JFU (Jurnal Fisika Unand).

1. License

The non-commercial use of the article will be governed by the Creative Commons Attribution license as currently displayed on Creative Commons Attribution-NonCommercial 4.0 International License.

2. Authors Warranties

The author warrants that the article is original, written by stated author(s), has not been published before, contains no unlawful statements, does not infringe the rights of others, is subject to copyright that is vested exclusively in the author and free of any third party rights, and that any necessary written permissions to quote from other sources have been obtained by the author(s).

3. User Rights

JFU's spirit is to disseminate articles published are as free as possible. Under the Creative Commons license, JFU permits users to copy, distribute, display, and perform the work for non-commercial purposes only. Users will also need to attribute authors and JFU on distributing works in the journal.

4. Rights of Authors

Authors retain the following rights:

  • Copyright, and other proprietary rights relating to the article, such as patent rights,
  • The right to use the substance of the article in future own works, including lectures and books,
  • The right to reproduce the article for own purposes, provided the copies are not offered for sale,
  • The right to self-archive the article.

5. Co-Authorship

If the article was jointly prepared by other authors, the signatory of this form warrants that he/she has been authorized by all co-authors to sign this agreement on their behalf, and agrees to inform his/her co-authors of the terms of this agreement.

6. Termination

This agreement can be terminated by the author or JFU upon two months notice where the other party has materially breached this agreement and failed to remedy such breach within a month of being given the terminating partys notice requesting such breach to be remedied. No breach or violation of this agreement will cause this agreement or any license granted in it to terminate automatically or affect the definition of JFU.

7. Royalties

This agreement entitles the author to no royalties or other fees. To such extent as legally permissible, the author waives his or her right to collect royalties relative to the article in respect of any use of the article by JFU or its sublicensee.

8. Miscellaneous

JFU will publish the article (or have it published) in the journal if the articles editorial process is successfully completed and JFU or its sublicensee has become obligated to have the article published. JFU may conform the article to a style of punctuation, spelling, capitalization, referencing and usage that it deems appropriate. The author acknowledges that the article may be published so that it will be publicly accessible and such access will be free of charge for the readers.