Kinerja Serapan Bunyi Komposit Ampas Tebu Berdasarkan Variasi Ketebalan dan Jumlah Quarter Wavelength Resonator terhadap Kinerja Bunyi

Restu Kristiani, Iwan Yahya, Harjana Harjana

Abstract


Telah dilakukan pengujian kinerja serapan bunyi dari komposit ampas tebu dikaitkan dengan pengaruh konfigurasi ketebalan dan konfigurasi quarter wavelength resonator. Pengujian kinerja dilakukan secara eksperimen menggunakan tabung impedansi dua mikrofon mengacu kepada prosedur ASTM E-1050-98.
Dalam penelitian ini dilakukan variasi tiga dan enam konfigurasi resonator serta variasi air cavity yakni 1, 2, dan 3 cm. Hasil penelitian menunjukkan bahwa komposit ampas tebu dengan konfigurasi enam resonator memiliki kinerja serapan bunyi terbaik. Adapun pengaruh ketebalan sampel adalah menggeser penyerapan bunyi efektif pada frekuensi rendah sementara penggunaan resonator efektif akan melebarkan rentang frekuensi penyerapan sehubungan dengan bertambahnya mekanisme redaman viskous bersamaan dengan mekanisme
serapan resonasi.

Keywords


bagasse; absorption coefficient; quarter wavelength resonators; impedance tube method

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DOI: http://dx.doi.org/10.12962/j24604682.v10i1.818

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