A New Estimation Model of Predicting the Sound Absorption Performance for Multiple Perforated Plate Systems

다중 다공판 시스템의 흡음성능 예측을 위한 계산모델 개발

A new estimation model of predicting the sound absorption performance for multiple perforated plate sound absorbing system was developed using transfer matrix method. The proposed method was validated by comparing the calculated absorption coefficients of a single layer perforated plate with the values measured by the two-microphone impedance tube method far various porosity and cavity depth. The developed transfer matrix method was further applied to estimate the multiple layer perforated plates and it is shown that the estimated absorption coefficients generally agree well with the measured values.