Physical and Mechanical Characteristics Analysis of Partition Composite Board Made of Coconut Shell Material

This research aims to examine the effect of thickness coconut shell composite board on elasticity, sound absorption, water and density. The elasticity test was conducted using tensilon RTF2350 machine at Faculty Mechanical Engineering absorption level meter GM1352 Science Mathematics State University Yogyakarta. varied, its measured machine, measurement determined a with source from generator frequency 1000Hz intensity 20 dB, while varied. elastic modulus decreased increase in partition thickness, increased thickness. Water by submerging into distilled for 30 seconds observing mass before after immersion water.