Koefisien Absorbsi Bunyi dan Impedansi Akustik dari Ampas Singkong (Manihot esculenta) dengan Menggunakan Metode Tabung

Authors

  • Yulia Rezita Laboratorium Fisika Material, Jurusan Fisika, FMIPA, Universitas Andalas
  • Elvaswer Elvaswer Laboratorium Fisika Material, Jurusan Fisika, FMIPA, Universitas Andalas
  • Rahmat Rasyid Laboratorium Fisika Elektronika dan Instrumentasi, Jurusan Fisika, FMIPA, Universitas Andalas

DOI:

https://doi.org/10.25077/jfu.8.2.146-150.2019

Abstract

Telah dilakukan penelitian untuk menentukan koefisien absorbsi bunyi dan impedansi akustik dari material ampas singkong dengan matriks lem PVC dengan menggunakan metode tabung. Sampel material akustik yang dibuat dari ampas singkong dengan variasi ketebalan 2 mm, 4 mm, 6 mm, 8 mm dan 10 mm. Pengukuran koefisien absorbs bunyi pada sampel menggunakan frekuensi 500 Hz, 1000 Hz, 1500 Hz, 2000 Hz dan 2500 Hz. Hasil penelitian ini menunjukkan nilai koefisien absorbsi bunyi tertinggi adalah 0,98 pada frekuensi 1500 Hz dengan ketebalan 10 mm dan nilai terendah adalah 0,64 pada frekuensi 2500 Hz dengan ketebalan 2 mm. Nilai impedansi akustik tertinggi adalah 2,78 pada frekuensi 1500 Hz dengan ketebalan 10 mm dan nilai terendah adalah 1,20 pada frekuensi 2500 Hz dengan ketebalan 2 mm. Dengan demikian ampas singkong potensial digunakan sebagai bahan penyerap bunyi berdasarkan ISO 11654 suatu material dapat dijadikan peredam suara jika material tersebut memiliki koefisien absorbsi bunyi minimum 0,15.

Kata kunci: ampas singkong, frekuensi, impedansi akustik, koefisien absorbsi bunyi, metode tabung

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Published

2019-04-01

How to Cite

Rezita, Y., Elvaswer, E., & Rasyid, R. (2019). Koefisien Absorbsi Bunyi dan Impedansi Akustik dari Ampas Singkong (Manihot esculenta) dengan Menggunakan Metode Tabung. Jurnal Fisika Unand, 8(2), 146–150. https://doi.org/10.25077/jfu.8.2.146-150.2019

Issue

Vol. 8 No. 2 (2019)

Section

Articles

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Copyright (c) 2019 Yulia Rezita, Elvaswer Elvaswer, Rahmat Rasyid

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