Pengukuran Koefisien Absorbsi Material Akustik dari Serat Alam Ampas Tebu Sebagai Pengendali Kebisingan

Authors

  • Fajri Ridhola Jurusan Fisika FMIPA Universitas Andalas, Indonesia
  • Elvaswer Elvaswer

DOI:

https://doi.org/10.25077/jif.7.1.1-6.2015

Abstract

Telah dilakukan penelitian tentang pengukuran koefisien absorbsi material akustik dari serat alam ampas tebu sebagai pengendali kebisingan. Metode yang digunakan yaitu metode tabung. Komposit berbahan dasar serat ampas tebu dengan matriks resin poliester–MEKPO. Komposit tersebut dibuat dengan massa serat berbeda dan massa resin poliester sama pada setiap sampel yaitu 60 g. Sampel 1 dengan massa serat 0,4 g, sampel 2 dengan massa serat 0,6 g, sampel 3 dengan massa serat 0,8 g, sampel 4 dengan massa serat 1 g dan sampel 5 dengan massa serat 1,2 g. Range frekuensi yang digunakan pada penelitian ini yaitu 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz dan 8000 Hz. Hasil penelitian menunjukkan bahwa nilai koefisien absorbsi bunyi pada sampel ke 4 paling tinggi terjadi pada frekuensi 1000 Hz yakni 0,961 dan sampel ke 5 memiliki nilai koefisien absorbsi paling rendah pada frekuensi 500 Hz dengan nilai 0,363. Nilai impedansi akustik tertinggi terjadi pada sampel ke 4 yaitu pada frekuensi 8000 Hz dengan nilai 0,9774 dyne.s/cm5. Serat ampas tebu ini sangat cocok digunakan pada ruangan audio karena memiliki nilai koefisien absorbsi yang cukup tinggi pada frekuensi 1000 Hz.

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References

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Published

2015-03-01

How to Cite

Ridhola, F., & Elvaswer, E. (2015). Pengukuran Koefisien Absorbsi Material Akustik dari Serat Alam Ampas Tebu Sebagai Pengendali Kebisingan. JURNAL ILMU FISIKA | UNIVERSITAS ANDALAS, 7(1), 1–6. https://doi.org/10.25077/jif.7.1.1-6.2015

Issue

Vol. 7 No. 1 (2015): March 2015

Section

Riset Artikel

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