Kinerja Serapan Bunyi Komposit Ampas Tebu Berdasarkan Variasi Ketebalan dan Jumlah Quarter Wavelength Resonator terhadap Kinerja Bunyi Restu Kristiani, Iwan Yahya, Harjana

Abstract

Sound absorption performance of bagasse composite has been conducted in associated with effect of thickness configuration and quarter wavelength resonator configuration. The testing was conducted experimentally refer to ASTM E-1050-98 standard procedure. In this measurement there are three variations and six resonator configuration and air cavity variations is 1, 2, and 3 cm. The results showed that bagasse composite with six resonators configuration has the best sound absorption performance. As for sample thickness affect and shifts the effective absorption to lower frequency band while the use of resonators effectively widen sound absorption range due to increased viscous damping mechanism simultaneously with resonance absorption mechanism.