There are many factors that cause the noise in the car, covering a wide range. Most of the noise in the car is caused by external factors, whether it is caused by the air transmission formed by the holes and gaps in the car body, or by the vibration of the car body structure. 

To realize the technology of body vibration reduction and noise reduction is to ensure the tightness of the body and reduce the transmission of external noise through the gap; to improve the structural mode of the whole body so that the structural state of the whole body has the natural frequency to reduce the intense frequency generated by the outside and further reduce the interior noise caused by the body resonance; to install some sound insulation equipment in the car, use sound-absorbing materials and absorb Noise in the car. In the production of automobile industry, it is an effective method to actively use damping patches to improve the structural strength of vehicles or weaken the vibration of sheet metal.