Penentuan Koefisien Absorbsi Bunyi dan Impedansi Akustik dari Serat Alam Eceng Gondok (Eichhornia Crassipes) dengan Menggunakan Metode Tabung

Authors

  • Vonny Febrita Jurusan Fisika FMIPA Universitas Andalas, Indonesia
  • Elvaswer -

DOI:

https://doi.org/10.25077/jif.7.2.45-49.2015

Abstract

Telah dilakukan penelitian untuk menentukan nilai koefisien absorbsi bunyi dan impedansi akustik dengan menggunakan metode tabung. Material akustik dibuat menggunakan serat eceng gondok dan matriks PVAc dengan ketebalan yang sama yaitu 0,8 cm. Pengukuran dilakukan pada frekuensi 400 Hz, 800 Hz, 1600 Hz, 3200 Hz dan 6400 Hz. Koefisien absorbsi bunyi tertinggi dengan nilai 0,98 pada frekuensi 6400 Hz adalah sampel 4 dengan komposisi serat 35,0 g dan matriks 27,5 g, sedangkan  koefisien absorbsi bunyi terendah dengan nilai 0,16 pada frekuensi 1600 Hz adalah sampel 2 dengan komposisi serat 30 g dan matriks 32,5 g. Nilai impedansi tertinggi yaitu 0,9869 kg/m2s, sedangkan nilai impedansi terendah 0,8825 kg/m2s. Nilai densitas tertinggi  yaitu 0,91 g/cm3, sedangkan nilai densitas terendah 0,67 g/cm3. Serat eceng gondok dapat digunakan untuk mengendalikan kebisingan karena mampu menyerap bunyi pada frekuensi rendah dan tinggi.

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References

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Published

2015-09-01

How to Cite

Febrita, V., & -, E. (2015). Penentuan Koefisien Absorbsi Bunyi dan Impedansi Akustik dari Serat Alam Eceng Gondok (Eichhornia Crassipes) dengan Menggunakan Metode Tabung. JURNAL ILMU FISIKA | UNIVERSITAS ANDALAS, 7(2), 45–49. https://doi.org/10.25077/jif.7.2.45-49.2015

Issue

Vol. 7 No. 2 (2015): September 2015

Section

Riset Artikel

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