흡음재특성에 따른 차량 실내 음질 예측 기술

초록

In the early design stage, prediction of the sound quality of interior noise is useful for the NVH development of a car according to the characteristics of the absorbing material. This paper presents a method to predict the quality of interior sound in a car cabin when the acoustic characteristics of absorption materials are changed. Firstly, a model to predict the interior sound of a virtual car is proposed based on a signal processing tool. Secondly, two sound quality indexes are developed that are used to estimate the sound quality according to seven different absorbing materials. Finally, the results are validated with experimental works. These processes can be successfully applied to the development of optimal absorbing materials for the improvement of the NVH in a car.

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