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박광서(Kwangse Park),권우성(Woosung Kwon),김인동(Indong Kim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2
This paper describes a procedure of transmission loss development in vehicle. Especially, this paper is focused on the transmitted noise through dash panel assembly from engine room to cabin. Included contents are the transmitted noise analysis procedure and method. Material properties of insulation, heavy layer and marble sponge were measured. Transmission loss results were obtained from analysis and measurement through dash panel from reverberating room to anechoic room. The simulation results of transmission loss data were compared with measurements data and were discussed in more detail. Finally, we dealt with a measured transmission loss data extended high frequency range and an evaluation of sound with insulation in a real vehicle.