The sound insulation project of Liwei automobile is completed through three steps: vibration reduction, noise reduction and sealing. Doors, trunk, chassis, hood and roof are all places that are prone to air friction noise. Most of the noise is introduced into the car through the suspension system, chassis, trunk and door of the car. Therefore, the door and trunk can not be ignored in the basic sound insulation project. For engine noise, a film can be pasted under the hood-an advanced sound-absorbing foam acoustic material, which can absorb and consume a lot of engine noise, suppress the vibration of the hood, block the heat emitted by the engine, and the effective rate reaches 97%, protecting the paint surface from long-term high temperature damage. In winter or cold areas, this film can also play a role in heat preservation and protect engine compartment parts from frost cracking. Owners should pay attention to the fact that all sound insulation materials must meet the requirements of relevant fire protection grades, so as to ensure vehicle safety and reduce vehicle weight.

Vehicle noise source:

1. Mechanical noise emitted by the vehicle itself;

2. Road noise caused by the friction between the tire and the ground;

3. Wind noise caused by high-speed driving;

4. Mixed noise from outside

Million car purchase subsidy