Analisis Performa Sound Transmission Loss dan Koefisien Absorbsi pada Panel Karpet Bihun dan Karpet Anti-Slip

Said, Muhammad Sabda Firli (2024) Analisis Performa Sound Transmission Loss dan Koefisien Absorbsi pada Panel Karpet Bihun dan Karpet Anti-Slip. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Perkembangan material peredam kebisingan telah berkembang sangat pesat. Terdapat 3 jenis material yang biasanya digunakan dalam pembuatan peredam kebisingan salah satunya adalah material pabrik. Dalam pembuatannya, material pabrik lebih mudah karena tidak memerlukan modifikasi dalam skala mikro atau struktur penyusun material tersebut. Suatu material memiliki mechanical properties yang berpengaruh terhadap karakteristik akustik bahan tersebut. Namun, secara bentuk karakteristik akustik bahan tidak hanya ditentukan mechanical properties. Untuk mengetahui seberapa baik suatu material dapat menginsulasi bunyi, dapat dilakukan dengan pengukuran Sound transmission loss (STL). Pada penelitian ini, bertujuan untuk mengukur STL dilakukan di ruang reverberation sebagai ruang penerima dan ruang semi-anechoic sebagai ruang sumber. Selain pengukuran STL, dilakukan juga pengukuran waktu dengung dengan untuk mendapatkan koefisien absorbsi. Panel uji yang digunakan adalah karpet bihun dan karpet anti-slip, dengan variasi penambahan plywood dan kain. Sumber bunyi yang digunakan adalah tone dengan rentang frekuensi dari 50-8000 Hz dengan filter 1/3 oktaf. Untuk pengukuran waktu dengung untuk mendapatkan koefisien absorbsi menggunakan ledakan balon sebagai impulse. Hasil yang didapatkan setelah melakukan penelitian kali ini adalah nilai STL kedua karpet mampu mereduksi lebih baik ketika di 500 – 8000 Hz kecuali pada variasi karpet anti-slip tanpa penambahan plywood dan kain. Dari nilai didapatkan nilai Sound Transmission Class (STC) tertinggi pada variasi karpet bihun dengan penambahan plywood dan kain yaitu STC 19. Untuk koefisien absorbsi didapatkan bahwa karpet Bihun menunjukkan lebih baik dengan nilai Noise Reduction Coefficient (NRC) 0,1 dibandingkan dengan karpet Anti-slip merah yang bernilai 0,05 dan karpet Anti-slip kuning bernilai 0,02.
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Interference material development has advanced extremely quickly. Factory material is one of the three types of materials that are typically used to make noise absorbers. Factory materials are simpler to manufacture because they don't need to have their structural composition or microscale composition altered. There are mechanical characteristics of a material that affect its acoustic properties. But the mechanical qualities of acoustic materials don't define their qualities alone. A material's ability to insulate sound can be determined by measuring its Sound transmission loss (STL). The purpose of this study was to measure STL in two different rooms: a semi-anechoic source room and a reverberation room used as receiving rooms. Reverberation time measurements were performed in addition to STL measurements in order to determine the absorption coefficient. “Bihun” carpet and anti-slip carpet were the test panels used; the addition of plywood and cloth changed the test results. The tone that is being used has a frequency range of 50 – 8000 Hz and is filtered by a 1/3 octave. To determine the absorption coefficient by measuring the reverberation time with an impulse from a balloon explosion. The research findings indicate that, with the exception of the anti-slip carpet variation that did not require the addition of plywood or cloth, the STL value of both carpets was able to decrease more effectively between 500 – 8000 Hz. The “Bihun” carpet variation with the addition of plywood and cloth has the highest Sound Transmission Class (STC) value among the values obtained, which is STC 19. It is discovered that the “bihun” carpet exhibits a higher absorption coefficient—a Noise Reduction Coefficient (NRC) of 0.1—than the red anti-slip carpet value of 0.05 and yellow anti-slip carpet value of 0.02.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	mechanical properties, semi-anechoic, reverberation, Anti-Slip, plywood, tone, impulse, Sound Transmission class
Subjects:	Q Science > QC Physics > QC162 Adsorption and absorption Q Science > QC Physics > QC221 Acoustics. Sound
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Muhammad Sabda Firli Said
Date Deposited:	15 Aug 2024 07:02
Last Modified:	15 Aug 2024 07:02
URI:	http://repository.its.ac.id/id/eprint/113982

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