Efficiency of acoustic absorption board from banana pseudo-stem

Abstract

Urbanization and transport development are the causes of noise pollution problem in present that adversely affects both human and animal health. The method to control these problems is using acoustic absorbing materials. Especially, local natural materials or agricultural wastes that green and sustainable. This study presented the efficiency of acoustic absorption board from banana pseudo-stem with different thickness; 0.5 cm, 1 cm, and 2 cm at constant density of 0.151 g/m³ and different density; 0.15 g/m³, and 0.357 g/m³ at constant thickness of 0.5 cm. The measurement of sound absorption coefficient (α) was conducted using a standing wave tube method according to ASTM C384-04. The result shown, the thickness of 2 cm of acoustic absorption board achieved highest value 0.81 ± 0.02 of NRC and 0.83± 0.15 of sound absorption coefficient, which shown it obtained best acoustical performance. The thickness of 0.5 cm with different density obtained equally value of NRC, also sound absorption coefficient. Thus, different density not influence to sound absorption coefficient and NRC. When the thickness of acoustic absorption board increase, sound absorption coefficient and NRC will also increase.