Pengaruh Perforasi Pada Material Akustik Terhadap Hamburan Diffuser

Firizqillah, Ayatullah Marhamah (2025) Pengaruh Perforasi Pada Material Akustik Terhadap Hamburan Diffuser. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Optimalisasi performa akustik suatu ruangan seringkali memerlukan strategi penanganan suara yang efektif, salah satunya melalui desain panel diffuser dengan perforasi. Panel ini dirancang khusus untuk meningkatkan penyebaran dan peredaman suara, berpotensi menciptakan kondisi ruangan dengan kualitas suara yang lebih baik dan merata. Penelitian ini membahas karakteristik pola hamburan suara dari tiga jenis panel diffuser yaitu panel tanpa lubang, panel dengan lubang berdiameter 2 mm, dan panel dengan lubang berdiameter 3 mm yang bertujuan untuk mengetahui pengaruh frekuensi terhadap pola hamburan serta menentukan desain panel yang paling optimal dalam mendukung difusi suara pada ruang akustik. Pengukuran dilakukan berdasarkan pendekatan standar ISO 17497-1 melalui perhitungan koefisien hamburan di ruang reverberation dan ISO 17497-2 melalui pengamatan pola hamburan di ruang semi anechoic dengan parameter yang dianalisis meliputi koefisien hamburan, pola hamburan, dan respons frekuensi terhadap panel. Hasil pengukuran menunjukkan bahwa pola hamburan yang cukup optimal pada frekuensi 1250Hz, dimana suara menyebar dan merata ke berbagai arah. Hasil pengukuran tersebut sesuai dengan hasil frekuensi resonansi, panel dengan lubang 2mm terdapat pada frekuensi menengah dengan nilai 976.75 Hz atau mendekati 1250Hz. Sementara pada panel dengan lubang sebesar 3mm dapat menyerap suara pada frekuensi menengah-rendah dengan nilai 722.10 Hz. Pengujian panel dengan menggunakan perforasi menunjukkan performa paling baik dalam menyebarkan suara dan menghasilkan nilai koefisien difusi yang konsisten pada perforasi dengan diameter 3mm. Dari ketiga panel yang diuji, panel dengan lubang berdiameter 3 mm terbukti sebagai desain yang paling efektif karena mampu menghasilkan nilai koefisien difusi tertinggi dan paling konsisten pada rentang frekuensi 250 hingga 2000 Hz serta memperlihatkan pola hamburan yang menyebar luas baik secara visual maupun numerik.
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Optimal acoustic performance in a room often requires effective sound treatment strategies, one of which is through the design of perforated diffuser panels. These panels are specifically designed to enhance sound scattering and absorption, potentially creating room conditions with better and more uniform sound quality. This research discusses the characteristics of sound scattering patterns from three types of diffuser panels: a panel without holes, a panel with 2 mm diameter holes, and a panel with 3 mm diameter holes. The aim is to determine the influence of frequency on the scattering pattern and to identify the most optimal panel design for supporting sound diffusion in acoustic spaces. Measurements were conducted based on the ISO 17497-1 standard approach through scattering coefficient calculations in a reverberation room, and ISO 17497-2 through observation of scattering patterns in a semi-anechoic chamber. The analyzed parameters included scattering coefficient, scattering pattern, and frequency response of the panels. The measurement results show that a sufficiently optimal scattering pattern occurred at 1250 Hz, where sound diffused and spread evenly in various directions. These measurement results align with the resonance frequency findings, where the panel with 2mm holes exhibited resonance at mid-frequency with a value of 976.75 Hz or approximately 1250Hz. Meanwhile, the panel with 3mm holes could absorb sound at mid-low frequencies with a value of 722.10 Hz. Testing panels with perforations demonstrated the best performance in sound scattering and yielded consistent diffusion coefficient values for the 3mm diameter perforations. Of the three panels tested, the panel with 3 mm diameter holes proved to be the most effective design as it was able to produce the highest and most consistent diffusion coefficient values in the frequency range of 250 to 2000 Hz,and showed widely diffused scattering patterns both visually and numerically.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Diffuser, Difusi, Frekuensi, Hamburan, Perforasi
Subjects:	Q Science > QC Physics > QC221 Acoustics. Sound
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Ayatullah Marhamah Firizqillah
Date Deposited:	05 Aug 2025 07:15
Last Modified:	18 Sep 2025 07:43
URI:	http://repository.its.ac.id/id/eprint/127333

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