NVH testing technology: According to the customer product design adaptive equipment to simulate the real working condition of the car，use the test system that consists of sensor, PC and vibration analysis softwares of sensor to realize comprehensive NVH analysis of drive axle assembly, gearbox, etc，Identify the operation status of the whole product and various parts, realize the pre-factory inspection and classification of the product, guide the product manufacturer to improve the structure and performance according to the product test results, and indicate the direction for the improvement of NVH performance and ride comfort of the whole vehicle.