Experimental investigation of the sound absorption coefficient of oil palm waste fiber

Ravichandran, Tiban (2022) Experimental investigation of the sound absorption coefficient of oil palm waste fiber. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

In this research, an experiment carries out to find the sound absorption coefficient of natural fiber extract from petioles of oil palm waste. For the past years, more synthetic fibers used in acoustic industry which give negative impact to the environment. The fiber will mix with silicone as a binder and make samples been testing to find out sound absorption efficiency. Many sound absorbers created using synthetic fiber and it causes of sound pollution to the environment. So, to avoid this problem the supervisor suggesting creating a sound absorber with natural fiber which eco-friendly to the environment. The aim of this research is been find out the sound absorption coefficient capacity of fiber which create from petioles of oil palm. Furthermore, the fiber will be test to find out the sound absorption efficiency in the presence of binder and without binder. This study mainly about determines ability of natural fiber in sound absorption coefficient. Other than that, develop a sample based on oil palm waste fiber and measure the sound absorption coefficient of natural fiber samples with binder for 1cm is 0.55, 2cm is 0.77, 3cm is 0.81, 4cm is 0.97, 5cm is 0.98, 6cm is 0.99 and without binder for 1cm is 0.82, 2cm is 0.88, 3cm is 0.96, 4cm is 0.98, 5cm is 0.99 and 6cm is 1.04 The fiber cut using mechanical retting process, extract the fibers from petioles of oil palm, wash and dry it under sunlight. Then blender the fiber until it gets softer. So, this is the process of extraction and creating fibers. At last, the sound absorption efficiency of oil palm fiber will be analyzed using an impedance test. Based on studies have been done, oil palm’s petioles have the capacity to be an absorptive material in acoustic industry in future.

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