How to do car sound insulation?

Shanghai Houyi Energy Saving Technology Co., Ltd. is the pioneer of China's sound-absorbing coating technology and construction, the company has introduced foreign advanced equipment and technology, and has cultivated and created a team of professionals who are proficient in hy4 sound-absorbing coating spraying technology and construction. Through continuous practice and exploration, the company has developed a variety of spraying products: sound-absorbing coatings, high-temperature insulation coatings, ultra-fine mineral fiber spraying, hard mineral fiber spraying, seamless sound absorption systems, curtain wall insulation professional spraying, etc.; It can be used in basement ceilings, exterior walls, elevator shafts, equipment rooms, libraries, churches, waiting halls, office buildings and other fields.

The company has always adhered to the corporate culture concept of "people-oriented, innovation as the soul", adhered to the business philosophy of innovation, energy conservation and environmental protection, and is willing to make outstanding contributions to China's energy conservation and environmental protection with our customers.

1. Engine noise: The vehicle engine is one of the most noisy vehicles, and its noise generation is different with the different engine speeds (mainly through: front fenders, hoods, fire barriers, exhaust pipes and transmission).

2. Road noise: road noise is generated by the noise caused by the wind cutting into the vehicle at high speed and the chassis vibration driven by driving, and the sand and gravel on the road will also produce noise from the chassis of the vehicle, which is the main road noise (mainly through: four doors, trunk, front fenders, front wheel arc generation and transmission).

3. Tire noise: tire noise is generated by the friction between the tire and the road surface when the vehicle is driving at high speed, depending on the road conditions to determine the size of the tire noise, the worse the road conditions, the greater the tire noise, and the tire irritation generated by the asphalt pavement and the concrete pavement is very different (mainly through: four doors, trunk, front fenders, front wheel arc generation and transmission).

4. Wind noise: Wind noise refers to the pressure of the oncoming wind in the process of high-speed driving of the car has exceeded the sealing resistance of the door and entered the car.

5. Resonance noise and others: the car body itself is like a box, and the sound itself has the nature of refraction and overlap, when the sound is transmitted into the car, if there is no sound absorption and sound insulation material to absorb and block, the noise will continue to refract and overlap, forming a resonant sound (mainly through: noise into the car, superimposed, reflective).

Automobile sound insulation is a systematic project, package: chassis sound insulation, door sound insulation, engine compartment, fender sound insulation, trunk sound insulation, it is recommended to find a professional construction site to ensure the environmental protection of the materials used, the integrity of the construction process.

If you want to learn auto repair skills, you can find a professional automobile training school for systematic and comprehensive learning, which can be considered from the following points: school social reputation, investment in teaching facilities and equipment, teaching faculty, employment rate, etc.

Hope it helps.

Here's an introduction to the most effective places for sound insulation in cars:

1. Making four doors can effectively reduce wind noise and resonance: the four-door sound insulation must first disassemble the door, remove the inner interior panel of the door, and then start the double-layer sound insulation and noise reduction construction of the four doors, and then assemble and restore after the construction is completed.

2. The position of the four-wheel fender can effectively reduce the noise caused by the friction between the tire and the road surface and the sheet metal resonance when the car is driving.

3. Trunk sound insulation can effectively reduce the noise from the trunk sheet metal resonance.

4. Doing car chassis sound insulation can effectively reduce the noise from low frequency.

The effect of car sound insulation is related to factors such as sound insulation materials, sound insulation parts, and the skills of the staff. Usually the noise that car owners hear during driving is mainly from tire noise, wind noise, engine noise, environmental noise, vibration, etc. Although the sound insulation treatment will be done when the vehicle leaves the factory, the sound insulation treatment effect is different for different models.

For different noises**, the most common areas where sound insulation can be applied include doors, trunks, hoods, sinks, chassis, headliners, fenders, door seals, wheels, etc. Therefore, if the whole car is not soundproofed, the owner can carry out sound insulation treatment according to the obvious part of the noise of his vehicle.

If the sound insulation effect of the vehicle itself is relatively good, the owner can not do the whole car sound insulation, and the installation of sealing strips on the door can also make the sound insulation effect better, or the tire noise is more obvious, then replace the silent tire or install sound insulation materials on the wheel lining, which can also improve the sound insulation effect of the vehicle.

Car sound insulation can be a construction part:

Hood, front fenders, fire barriers, U-grooves, four doors, cockpit floor, roof, trunk floor, rear fenders, trunk side cavities, rear tailgate, exterior four-wheel supports.

For cost-effective practices, you can choose the following parts:

Fire retaining wall, U-shaped slot, trunk floor, rear fender, cavities on both sides, four-wheel support outside the car. After doing this, tire noise, road noise, and engine noise can be effectively reduced, and you can feel quieter than before when driving. If you often run at high speed, it is recommended to do the whole car, which is the most comprehensive construction site and the best noise reduction solution.

1. Engine soundproof cotton. For the sound insulation in the engine room, buy a piece of wave-type sound-absorbing cotton (the smell of fire prevention is more unpleasant than that of fire prevention), and then buy a can of spraying glue. Spray glue in the engine compartment when it is not hot, and then apply the sound-absorbing cotton to the hood.

2. Sound insulation strips are pasted in the door and at the joints. Door frame sound insulation, you can buy sound insulation cotton strips or sound insulation rubber strips, or sound insulation wool felt strips pasted on the seams of the door frame, that is, to complete the door frame sound insulation. In this way, the sound of wind shearing and some noisy noises coming from outside the car can be effectively suppressed.

3. A, B, C pillars are attached to sound-absorbing cotton or foaming agent. A, B, C pillars sound insulation, reinforcement. The cavities on the A, B, and C pillars are filled with about 40% foaming agent with PU foaming agent (because it will foam and expand), which can effectively prevent the abnormal sound caused by metal vibration and increase the rigidity of the car body, and complete the sound insulation project of the A, B, and C pillars.

4. The chassis is soundproof, which requires professional operation. Due to the complexity of chassis sound insulation, it is generally not recommended to operate personally, and this needs to be done in a professional car modification shop for sound insulation. The main thing is to remove the seat and upholstery, and then paste soundproof cotton or sound-absorbing cotton.

5. Tail box sound insulation. Affix sound insulation materials to the tail box, and the wheel eyebrows on both sides of the tail box can not be missed, which can effectively reduce the tire noise road noise and the noise caused by the tail row, and at the same time will effectively reduce the low-frequency resonance noise caused by the bass part. Most of the tire noise and road noise when the car is driving at low speed are suppressed, the stability of the car is greatly increased, the chaotic noise and falling apart feeling when crossing the potholes and uneven roads are gone, and the shock absorption and cushioning performance of the vehicle is significantly improved.