임피던스 관을 이용한 흡음재의 특성 임피던스 측정： 배후조건에 따른 민감도 분석

Impedance Tube Measurements of Sound Absorbing Materials： Sensitivity Analysis on Backing Conditions

Effects of backing conditions on the impedance tube measurement are investigated experimentally, by using several pairs of generally employed end conditions. The results show that the measured values are similar for most of pairs, except the case of using an open pipe condition. In addition, the random error is investigated in the viewpoint of the variation of test conditions. The multi-termination method is suggested for minimizing such a random error.