Pemanfaatan Limbah Daun Nanas (Ananas Comosus) Untuk Panel Akustik Sebagai Absorbsi Kebisingan
DOI:
https://doi.org/10.25077/jfu.11.4.467-473.2022Abstract
Telah dilakukan penelitian untuk menentukan nilai koefisien absorbsi bunyi dan impedansi akustik dengan menggunakan metode tabung. Material Akustik dibuat dari  serat daun nanas dan matriks resin epoksi dengan memvariasikan komposisi massa dari serat daun nanas dan volume resin epoksi pada setiap sampel. Variasi komposisi antara serat daun nanas dengan resin epoksi berturut-turut adalah 17,5 g : 6,41 ml, 18,12 g : 5,87 ml, 18,75 g : 5,34 ml, 19,37 g : 4,8 ml, dan 20 g : 4,27 ml. Range frekuensi kebisingan yang digunakan pada penelitian ini yaitu 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz, dan 8000 Hz. Nilai koefisien absorbsi dan impedansi akustik tertinggi terdapat pada frekuensi 8000 Hz pada sampel 5, dengan nilai koefisien absorbsi sebesar 0,87 dan nilai impedansi akustik sebesar 1,35 dyne.sec/cm5. Semakin tinggi massa serat daun nanas dan semakin rendah volume resin epoksi maka nilai koefisien absorbsi dan impedansi akustik yang diperoleh akan semakin tinggi.References
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