1. Hood insulation cotton (also called automobile sound insulation cotton), it mainly absorbs the noise when the engine is running, and also has a heat insulation function, which can effectively protect the original paint of the hood and avoid discoloration of the paint due to high temperature for a long time.
2. Car chassis sound insulation materials, vibration-damping mats and moisture-proof sound-proof cottons for the central chassis and rear chassis of the vehicle. The main function is to deal with the central chassis and the chassis under the luggage compartment. The sheet metal parts vibrate and resonate at high speeds, and The road noise transmitted from the tires to the chassis and the resonance sound pressure of the exhaust sound introduced into the rear box. (It is better to add chassis armor)
3. Special shock-absorbing and sound-proof panels inside and outside the door maintenance warehouse strengthen the rigidity of the door panel and reduce the resonance caused by the thinner sheet metal of the car door when driving, causing the door interior panels and parts to become loose, or due to the age of the car, for a long time When driving on rugged roads, the noise generated by metal fatigue and the twisting of the body; at the same time, the sound insulation cotton in the door trim is added to effectively absorb the auxiliary wave and improve the sound quality of the audio speaker.
4. Sound insulation of the engine fire wall, and strengthened muffler cushion under the instrument seat. The engine is the most important source of noise and the noise source closest to the driver. After strengthening the material of the lower part of the dashboard and the thickness of the engine firewall, it can suppress the high frequency sound pressure that is transmitted into the car interior when the engine speed is increased. It is a sound insulation project. The most obvious part of the effect.
5. Door sound insulation strips. The most important thing for car sound-absorbing sponge strips is to strengthen the sealing of the door and the door frame, which can effectively reduce the wind cutting noise of the car at high speeds. It can also replace the old and flexible waterproof rubber strips. The most important thing is to make the car compartment. The air tightness inside is better.
6. Sound insulation of front and rear wheel arcs and fenders. This is the place where chassis noise is most often introduced. The abnormal sound introduced by the shock absorber during driving and the suppression of the impact noise generated by tires and road surfaces, gravel and sheet parts, construction After that, it can significantly reduce the noise caused by the road surface and shock absorbers. The price of this key construction part is also higher, but the effect should be obvious.