The Effect of Air gap Insertion in Test Acoustic Performance of Sound Barrier using Structural Vibration System

구조 진동 시스템을 이용한 흡차음재 음향 성능 실험시 공기 층 삽입의 효과

In this paper, it is presented that the effect of air gap insertion in testing the transmission loss of sound barrier using structural vibration system. In this study, we use the APAMAT based on the structure-borne-noise. The measured results show that air gap insertion improves transmission loss as results of test based on the air-borne-noise. The measured results are compared with the predicted transmission loss using the transfer matrix method. The predicted results were found to be in reasonable agreement with measured results.