A measuring technology of the absorption ratio and the transmission loss using the tube method

관내법을 이용한 흡.차음 성능 측정방법

To measure the absorption ratio and the transmission loss of a material, a usage of the reverberation room has been popular. However, the reverberation room is expensive to build it and, sometimes, test procedure is not easy. Therefore, to get the data of absorption ratio, several possible technologies has been proposed using the tube. Among these technologies, with the analysis of the spectral density, a convenient method has been introduced to measure both the absorption ratio and transmission loss. The measured data has been compared with the results of the measurement at the reverberation room.