Acoustic characteristics board of areca nuts fiber composites

This research aimed to determine the ability of Areca nuts fiber composite in sound absorption. The Areca nuts fiber composite board uses polyester resin as a binder. The Areca nuts fiber used in this research is fiber obtained from Areca nuts which are old and are not being used anymore. The sample was made by varying the concentration of fiber used (30, 40, 50, 60 and 70) %. The result of the absorbency coefficient of the composite is proportional to the concentration of fiber used. The Areca nuts fiber composite board is excellent to be used as a sound absorbance material because it has the highest absorption coefficient of 0.77, higher than the absorbency coefficient of ISO 11654 standard; 1997 (E) of 0.15. Sound absorption is obtained from measurements using impedance tube bystandardizing ASTM E1050-1990. The addition of Areca Nuts concentration makes the composite the higher the level of absorbance that makes the quality of the composite as an absorber the higher the quality. It was found that this composite has the characteristic of being able to absorb sound high enough at the sound frequency despite the high frequency.