In the field of appropriate technology, utilizing the waste industry is one of a very good way to maximize the natural resources that are available so that it can be useful for human life. One of the industrial waste used in this final project research's is waste cocodust that is very much there is of course in almost all regions in Indonesia. Cocodust is used to create a sound absorber plate with the
press process 25 Bar.
Making a sound absorber plate based cocodust is to describe the value of coefficients absorbs (a ) on the different variations of thickness and the impact on the value of coefficients absorbs (a ), and to develop the acoustic material from the cocodust waste. Description of the value coefficients absorbs (a ) are done with the 2 methods, namely impedance tube method and the experimental method.
Results obtained in general is the value of coefficient absorbs (a ) tended to increase in the high frequency. In the test method with the experimental value of coefficient absorbs (a ) on the first layer thickness is higher than the second layer thickness. While in the test impedance tube method the value of coefficient absorbs (a ) on each thickness of these tend to the same and greater than in the experimental method.
Keywords: waste, cocodust, sound absorber
