DefinePK

Abstract

Sound pollutions have become a disturbing source that interfere with the human life. Most of the expensive sound absorption materials are employed to control noise disturbances. Therefore, this research is aimed to study the effect of sound absorption properties of alternative absorption materials from natural fibers with different types of mixture composition. This includes natural fibers of coconut coir, rice straw, arenga pinnata, palm oil and kenaf fibers. Researchers are more interested in natural and renewable materials where the fibers are well modified by adding some polymers or binder and also recycled materials such as recycled rubber from industries. The method used for identifying the performance of absorption is by using the impedance tube where the loudspeaker feeds the signal in the tube as the incident wave and the reflected sound is recorded by the microphones which is then processed to quantify the absorption coefficient of the material. The other method are by using the reverberant room which is rarely because it required a large and expensive facilities but both method have same purpose. From the result, we can get the value of noise reduction coefficient for each of the samples. Predictably, different materials and compositions give different result of sound absorption coefficient same as other potential aspects that influence the absorption performance. As progress in technology, reinforced natural fiber has enhanced the control of sound quality in the room interior and it is important to balance the development of advanced materials which is cost effective and environmental friendly.