Analysis and Improvement of Mid and High Frequency Noise in A Pure Electric SUV

In this paper, a pure electric SUV is taken as the research object. Based on the statistical energy analysis method, the energy contribution rate of the high-frequency noise in the driver's head is analyzed, and the subsystems with the largest energy contribution rate to the driver's head acoustic cavity are the front wall and the front windshield. Through the orthogonal design method, the acoustic package of the front wall is optimized and analyzed to get the optimal design of the front wall acoustic package. At the same time, the new diatomite polyurethane composite material is used to replace the traditional front wall sound reduction pad material, effectively reducing the driver's head sound pressure level. The use of PVB laminated glass instead of traditional single-layer glass achieves noise reduction in the vehicle interior. Combined with three optimization and improvement schemes, the sound pressure level of driver's head noise is effectively reduced.