Author:
Kusno A,Ishak M T,Rahim R,Hamzah B,Mulyadi R,Jamala N,Anggraeni R
Abstract
Abstract
This research aims to determine sound absorption coefficients of absorber materials making from coconut leaf midribs. Absorber material has been made with different arrangement and thickness. Nine samples have been made which consists of 3 configurations and each configuration consists of 3 thicknesses. Absorption coefficients were measured by using impedance tube method. The experiment results show that coconut leaf midrib is up to standard for absorber material according to ISO 11654 with α over 0.15. The absorption coefficient obtained by the whole sample is in the range 0.02 to 0.65. Fluctuating values are affected by differences forms and thicknesses. Absorber materials that have been made are also compatible with marketed products.
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