Utilization of Waste Stem of Oilpalm For The Manufacture of Particle Board Composite Sound Absorbency

A common problem experienced by people in Indonesia is the increase inpollution, one of which is noise pollution (noise). Therefore, in this study a compositeboard is intended to be used as a sound absorber. This study aims to determine theacoustic properties of particle board made from palm frond waste. Composite boardsare made from palm oil midrib waste using urea formaldehyde matrix as an adhesive.The composite board is made with 10%, 15% adhesive fraction and then the absorptioncoefficient test is carried out. The results obtained in the test showed that the averageboard density obtained was 0.402 g/cm3, 0.601 g/cm3 and 0.922 g/cm3 for the 10%adhesive board while for the 15% adhesive the average board density produced was0.406 g/cm3, 0.618 g/cm3, 0.955 g/cm3. Judging from the resulting particle boardincluded is in the category of medium quality particle board. For testing the absorptionof particle board produced at a frequency of 500 Hz as the mean of 0.9, it is includedin the category of high-quality particleboard according to ISO 11654 standard.