UJI DESKRIPSI REDAMAN SUARA PADA PLAT HASIL PENGOLAHAN LIMBAH SERABUT DAN SERBUK AREN DENGAN PROSES TEKAN CETAK 5 BAR

Abstract

In the field of appropriate technology, utilizing the waste industry is one of a very good way to maximize the natural resources so that it can be useful for human life. One of the industrial waste used in this final project research's is sugarpalmfiber and sugarpalm powder. Sugarpalm fiber and sugarpalm powder is used to create a sound absorber plate with the moldpress process at 5 Bar. Making a sound absorber plate based this waste industry is to describe the value of coefficient absorbs on the two variations of thickness and the impact on the value of coefficient absorbs and to develop the acoustic material from the Sugarpalm fiber and sugarpalm powder waste. Description of the value coefficients absorbs are done with the 2 methods, namely impedance tube method and the direct measuring method. Results obtained in general is the value of coefficient absorbs tended to increase in the high frequencies. In the test with the direct measuring method, the value of coefficient absorbs on the first layer thickness is higher than the second layer thickness. While in the test impedance tube method the value of coefficient absorbs on each thickness of these tend to the same and greater than in the direct measuring method.