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이건희(Kunhee Lee),신태진(Taejin Shin),이상권(Sangkwon Lee),김근영(Keunyoung Kim) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5
These days, drivers are not satisfied with simply being the cabin noise reduced, but demand to hear better sound in the cabin. Therefore, Automobile companies are conducting a lot of research in order to reduce the noise by considering the feelings of the drivers. In this study, we have investigated the relationship between sound-absorbing materials and sound quality based on ray acoustics and signal processing. First, the impulse response functions from engine to dash and from dash to driver’s position are calculated using ray tracing method. Second, two impulse response functions are convoluted by engine noise signal to yield the cabin noise. The cabin noise are used for the calculation of sound metric and the subjective test. The correlation between sound metric and subjective test are used and estimated for the production of sound quality index in accordance with sound-absorbing materials. The experimental method is also performed for the validation of index. The index will contribute to saving test time and developing a good performance sound-absorbing material.