Karakterisasi Koefisien Absorpsi Bunyi dan Impedansi Akustik dari Panel Serat Tandan Kosong Kelapa Sawit dengan Menggunakan Metode Tabung

Authors

  • Muhammad Nikon Laboratorium Fisika Material, Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Andalas Kampus Unand Limau Manis, Padang, 25163, Indonesia
  • Elvaswer Elvaswer Laboratorium Fisika Material, Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Andalas Kampus Unand Limau Manis, Padang, 25163, Indonesia

DOI:

https://doi.org/10.25077/jfu.12.3.492-498.2023

Keywords:

Frekuensi, Impedansi Akustik, Koefisien Absorpsi, Metode Tabung, Serat Tandan Kosong Kelapa Sawit

Abstract

Penelitian ini bertujuan untuk menentukan nilai koefisien absorpsi bunyi dan impedansi akustik dengan menggunakan metode tabung. Panel akustik dibuat dari material akustik berbahan dasar serat tandan kosong kelapa sawit dan matriks lem kanji dengan memvariasikan panjang serat yang digunakan pada setiap sampel. Variasi panjang serat yang digunakan yaitu 0,5 cm, 1 cm, 1,5 cm, 2 cm dan 3 cm. Variasi frekuensi yang digunakan pada penelitian ini yaitu 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz, 8000 Hz. Nilai koefisien absorpsi yang tertinggi yaitu 0,99 pada frekuensi 500 Hz untuk sampel 1, sampel 3 dan sampel 4. Nilai impedansi akustik tertinggi terdapat pada sampel 1 yaitu 1,96 dyne.sec/cm5 pada frekuensi 500 Hz. Semakin panjang variasi serat yang digunakan maka akan menghasilkan porositas yang tinggi sehingga penyerapan gelombang bunyi menjadi maksimal. Berdasarkan ISO 11654 nilai koefisien absorpsi bunyi dan impedansi akustik minimum adalah 0,15, dan serat tandan kosong kelapa sawit memiliki nilai di atas 0,15 sehingga berpotensi sebagai bahan dasar material akustik.

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Published

2023-07-03

How to Cite

Nikon, M., & Elvaswer, E. (2023). Karakterisasi Koefisien Absorpsi Bunyi dan Impedansi Akustik dari Panel Serat Tandan Kosong Kelapa Sawit dengan Menggunakan Metode Tabung. Jurnal Fisika Unand, 12(3), 493–499. https://doi.org/10.25077/jfu.12.3.492-498.2023

Issue

Vol. 12 No. 3 (2023)

Section

Articles

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