Hasbi, Farhan Aly (2024) Simulasi dan Analisis Pengaruh Parameter Geometri Micro Perforated Panel (MPP) terhadap Kemampuan Penyerapan Suara dan Sound Transmission Loss pada Frekuensi Rendah. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kebisingan pada frekuensi rendah memiliki karakteristik panjang gelombang yang besar sehingga sulit bagi material penyerap suara untuk mereduksi energi suaranya. Material berpori cenderung efektif pada rentang frekuensi menengah hingga tinggi serta kurang baik bagi kesehatan. Micro perforated panel diajukan pada penelitian ini sebagai media untuk membantu mengatasi kebisingan frekuensi rendah dengan kemampuan pengaturan frekuensi target penyerapan yang presisi dengan perubahan parameter geometri MPP. Namun, MPP saat ini masih sangat jarang digunakan karena kemampuan penyerapan suaranya yang sangat sempit pada area frekuensi resonansinya saja. Penelitian ini bertujuan untuk mengetahui pengaruh perubahan parameter geometri MPP terhadap kinerja penyerapan suara (α) dan sound transmission loss pada frekuensi rendah serta mendesain konfigurasi MPP yang memiliki kemampuan penyerapan suara lebih lebar. Proses tersebut ditempuh menggunakan perangkat lunak ANSYS 2024 R2 dan AFMG Soundflow. Didapatkan bahwa peningkatan diameter lubang perforasi membuat frekuensi resonansi lebih tinggi dan kenaikan koefisien penyerapan suara (α). Peningkatan jarak perforasi dan penambahan ketebalan panel menghasilkan penurunan frekuensi resonansi dan penurunan nilai α. Sedangkan, peningkatan kedalaman rongga udara menghasilkan penurunan frekuensi resonansi namun tidak signifikan mengubah nilai α. Pada aspek STL, peningkatan ketebalan panel, pengurangan ukuran diameter, serta peningkatan jarak perforasi terbukti meningkatkan kinerja STL. Kinerja STL terbaik diperoleh pada konfigurasi d=0,4 mm, b=10 mm, serta t=2,5 mm dengan rentang STL 20 dB – 40,54 dB pada frekuensi 63 – 4000 Hz. Didapatkan pemahaman bahwa konfigurasi multi-layer MPP dapat memperluas frekuensi penyerapan suara MPP dengan mode triple-layer MPP (MLMPP3) yang disusun secara seri berhasil menciptakan 3 puncak penyerapan suara pada frekuensi 250 Hz, 600 Hz, dan 850 Hz dengan masing-masing koefisien penyerapan suara bernilai 99,6%, 90,67%, dan 97,9%.
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Noise at low frequencies has the characteristics of a large wavelength, making it difficult for sound-absorbing materials to reduce the sound energy. Porous materials tend to be effective at medium to high frequencies and ranges that are less good for health. Micro perforated panels are present in this research as a medium to help overcome low frequency interference with the ability to precisely regulate frequency by changing the geometric parameters of the MPP. However, MPP is currently very rarely used because its sound absorption capability is very narrow only in the resonant frequency area. This research wants to study the effect of changing MPP geometric parameters on sound absorption coefficient (SAC) performance and sound transmission loss at low frequencies and to design an MPP configuration that has wider sound absorption capabilities. This process was carried out using ANSYS 2024 R2 and AFMG Soundflow software. It was found that increasing the diameter of the perforation hole made the resonance frequency higher and the sound absorption coefficient (α) increased. Increasing the perforation distance and increasing the panel thickness resulted in a decrease in the resonance frequency and a decrease in the α value. Meanwhile, increasing the depth of the air cavity resulted in a decrease in the resonance frequency but did not significantly change the α value. In the STL aspect, increasing panel thickness, reducing diameter size, and increasing perforation distance are proven to improve STL performance. The best STL performance was obtained in the configuration d=0,4 mm, b=10 mm, and t=2,5 mm with an STL range of 20 dB – 40.54 dB at a frequency of 63 – 4000 Hz. It is understood that the multi layer MPP configuration can increase the sound absorption frequency of the MPP with the triple layer MPP mode (MLMPP3) arranged in series successfully creating 3 sound absorption peaks at 250 Hz, 600 Hz and 850 Hz with each sound absorption coefficient of 99,6%, 90,67%, and 97,9%.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | ANSYS Workbench, Koefisien Penyerapan Suara, Micro Perforated Panel, Sound Transmission Loss, Sound Absorption Coefficient |
| Subjects: | Q Science > Q Science (General) > Q180.55.M38 Mathematical models Q Science > QC Physics > QC162 Adsorption and absorption Q Science > QC Physics > QC221 Acoustics. Sound T Technology > T Technology (General) > T57.62 Simulation T Technology > TA Engineering (General). Civil engineering (General) > TA174 Computer-aided design. T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TD Environmental technology. Sanitary engineering > TD892 Noise control |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | Farhan Aly Hasbi |
| Date Deposited: | 12 Aug 2024 08:49 |
| Last Modified: | 28 Aug 2024 05:16 |
| URI: | http://repository.its.ac.id/id/eprint/114243 |
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