A Study on the Acoustical Characteristic of a Ultra Lightweight Concrete Absorber

초경량 콘크리트 흡음재의 음향특성에 관한 연구

Two basic acoustic quantities, the characteristic impedances and the propagation constants, of the two different ultra lightweight concrete absorbers were examined with impedance tube method. A transmission loss was tested and compared with theoretical values. The results show that these kinds of sample have proper sound absorption and transmission loss capabilities. It means that they can be used in various fields where noise proof is needed.