PENGARUH JUMLAH CELAH PERMUKAAN BAHAN KAYU LAPIS (PLYWOOD) TERHADAP KOEFISIEN ABSORPSI BUNYI DAN IMPEDANSI AKUSTIK

Authors

  • Ade Oktavia Jurusan Fisika FMIPA Universitas Andalas
  • Elvaswer - Jurusan Fisika FMIPA Universitas Andalas

DOI:

https://doi.org/10.25077/jfu.3.3.135-139.2014

Abstract

ABSTRAK

Telah dilakukan pengukuran koefisien absorpsi bunyi dan impedansi akustik pada material kayu lapis menggunakan metode tabung. Perlakuan pada material kayu lapis tanpa celah dan 25 celah rentang frekuensi yang digunakan yaitu  500 Hz, 1000 Hz, 2000 Hz, 4000 Hz dan 8000 Hz. Hasil penelitian menunjukkan nilai koefisien absorpsi bunyi tanpa celah yaitu 0,90 sedangkan kayu lapis dengan 25 celah terjadi peningkatan nilai koefisien absorpsi bunyi menjadi 0,98 pada frekuensi 4000 Hz. Nilai impedansi akustik yang diperoleh pada kayu lapis tanpa celah dengan frekuensi 4000 Hz yaitu 1,1015 kg/m2s sedangkan kayu lapis dengan 25 celah yaitu 1,1067 kg/m2s.

Kata kunci : koefisien absorpsi bunyi, impedansi akustik, kayu lapis, frekuensi, metode tabung

Abstract

The research to determine absorption coefficient of sound and acoustic impedance by using tube method for plywood material has been done. There are two of plywood are used, 25 slots and no slot with frequency range at 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz and 8000 Hz. The results show that the absorption coefficient of sound at plywood with no slot is 0.90 and at plywood with 25 slots have increase to 0.98 in frequency 4000 Hz. Acoustic impedance in frequency 4000 Hz  at plywood with no slot is 1.1015 kg/m2s and 1.1067 kg/m2s at plywood with 25 slots.

Keywords : sound absorption coefficient,  acoustic impedance, plywood, frequency, tube method

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Published

2024-10-26

How to Cite

Oktavia, A., & -, E. (2024). PENGARUH JUMLAH CELAH PERMUKAAN BAHAN KAYU LAPIS (PLYWOOD) TERHADAP KOEFISIEN ABSORPSI BUNYI DAN IMPEDANSI AKUSTIK. Jurnal Fisika Unand, 3(3), 135–139. https://doi.org/10.25077/jfu.3.3.135-139.2014

Issue

Vol. 3 No. 3: Juli 2014

Section

Articles

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Copyright (c) 2024 Ade Oktavia, Elvaswer -

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