Experimental study of Natural composite Material on Acoustic properties

Abstract

The nature of natural fibers is porous, which is useful feature for sound absorption. These types of materials (natural) are less ecofriendly and ecofriendly. This study deal with the effect of using natural composite material as sound insulation, many types of natural materials with fiber glass had been used in this study, i.e. cotton, wool, fronds and vegetarian fibers with different thicknesses. The study consist of built attest rig to measure the different frequencies and sound waves experimentally to calculate the transmission losses and coefficient of transmission losses that are dialing from function generator use sound pressure level. The best results of transmission losses recorded for the composite materials (Polyester +Random + wool) and (polyester + fiber glass + cotton) in three thickness 6mm, 8mm and 10mm. From other side, the best results of absorption of noise at different frequencies recorded for (polyester + fiber glass + cotton) and (Epoxy + fiber glass + plan fronds) in three thicknesses.