Absorber of paper waste and rice husk to reduce noice in car cabin of electrical vehicle

This study was conducted to determine the potential of office paper waste and rice husk as acoustic cell material as an absorbent noise. The acoustic cell material combines waste paper and rice husk are given a binder of PVA (polyvinyl acetate). Studies conducted with specimens of making destroy paper then mixed with rice husk. Previous chemically treated rice husks with alkali method governed by variations immersion 0, 1, 2, 3, and 4 hours, the purpose of this treatment is to remove lignin and determine the effect on noise absorption. Variations in the composition of office paper (OP) : rice husk (RH) are 90:10, 85:15, 80:20, while the variation is the addition of PVA binder 6, 8, and 10% of the total weight of the OP + RH. Variations compaction is 3:4, 4:4, and 5:4, and the specimen thickness variation is 1, 1.5, 2 cm. 2 microphone impedance test is based on ASTM E1050 used for noise absorption test specimens. Impedance test showed that the optimal noise absorption occurs in specimens composition; OP:RH (80:20), PVA 6 %, rice husk without alkali treatment (0 hours), 3:4 compaction, and specimen thickness 2 cm. The noise absorption coefficient (α) is optimal from 0.3 to 0.4.