Automobile NVH is composed of the initial letters of noise, vibration and harshness in English. Due to the enhancement of people's awareness of environmental protection, people put forward new requirements for the automobile industry. At present, automobile design and production quality need to take this as a new standard. With the continuous improvement of people's living standards and the increasing number of private cars, people are more and more concerned about the control of noise and vibration in the car. When evaluating the quality of the car, the control noise level in the car has become one of the important signs.

Automobile manufacturers are faced with the dilemma of controlling and weakening vehicle noise when they produce automobiles. At the beginning of vehicle design, the whole NVH quality power assembly, body structure and chassis vibration reduction and noise reduction are controlled. The passive noise reduction technology and the application of vibration reduction and noise reduction materials in the finished vehicle body are indispensable. Therefore, it is an important parameter of vehicle quality to rectify the NVH of the whole vehicle during the production of the finished vehicle.