@thesis{thesis,
		author={Permadi  Isabella Bekti},
		title ={PENGARUH VARIASI KOMPOSISI SERBUK KAYU JATI DENGAN TEPUNG KANJI PADA KOMPOSIT TERHADAP REDAMAN SUARA DAN POROSITAS},
		year={2020},
		url={http://eprints.umm.ac.id/61254/},
		abstract={utilization of wood powder waste from the production of furniture one of them is to be processed into sound reducer material for music studio, home theater, and cinema. The purpose of this research is to influence the variation of teak wood powder composition and starch on composite to sound attenuation and porosity. At this research starch used as a matrix and reinforced with teak wood powder. The composition of variations used is 50% powder and 50% starch, 60% powder and 40% starch, 70% powder and 30% starch. Tests conducted include sound attenuation testing and porosity. The lowest sound attenuation value is found in the composite with a variation of teak wood powder of 70% with a value of 0.0766 at 750 Hz frequency. And the highest is on a composite with a variation of teak wood powder 50% with a value of 0.1566 at a frequency of 750 Hz. Composite with a variation of teak wood powder 50% indicates the price is already qualified ISO 11654 is value (α) more than 0.15. The results of the porosity test of the composite with a variation of teak wood powder 70% by 93.6% got the sound attenuation value (α) of 0.0766, and the porosity of the composite with a variation of teak wood powder 50% of 24.79% got a sound attenuation value (α) amounting to 0.1566. Then it can be said the lower the value of porosity the better the sound attenuation value.}
		}