How to judge the sound insulation effect of a car? Car Sound Insulation Methods Where is the most ef

Close the doors and windows when idling, measure with a decibel meter, if the noise is within 50 decibels, the sound insulation effect of the vehicle is very good.

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.

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).

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.

The sound insulation of the vehicle depends on the thickness of the vehicle's doors, the sound insulation of the windows, the thickness of the sound, and the quietness of the tires.

Doors, four doors are the largest moving parts in a car. The thickness and structure of the doors can determine the sound insulation in the car, which is why the doors under 100,000 are fluttery when closed, and the sound is dull and heavy when the doors are closed in luxury cars.

Car glass also determines the sound insulation of the car. Good car glass is often multi-layer thickened, and the sound insulation effect will be better, while cheap models are very ordinary single-layer glass, so the sound insulation effect will be greatly reduced.

Chassis noise is very noticeable at high speeds. The sound insulation of this component depends mainly on the strength of the manufacturer's chassis construction. The average luxury brand invests a lot of money in chassis tuning and R&D costs every year, while the budget model is a first-generation chassis manufacturing platform that has been in use.

Tire noise from four tires is also an important part of vehicle noise. Tire noise depends not only on the quality of the suspension and whether it is soft, but also on the brand and production process of the tire. In general, tires with a good silent effect do not have good wear resistance, while wear-resistant tires do not have a good silent effect.

If there is a requirement for sound insulation, you can choose to do sound insulation for the whole vehicle.

Sound insulation and noise reduction. Automotive sound insulation engineering can effectively eliminate and block noise, vibration, resonance, friction sound and air resistance of the road and door, giving you a quiet driving space.

Strengthened body: The metal plates that are not critical parts of the body cover, doors, trunk, roof and fenders are relatively weak, and the body is stronger. In the case of collision, the safety correlation coefficient of passive learning can be effectively improved.

Optimized sound effects; Sound, especially in the rear woofer, can cause the trunk to vibrate and reduce the sound. It's because of the impact. The structure of the car cannot withstand the bass shock.

If it is not done well, it will make a "squeak" sound. After the construction noise is eliminated, the resonance of the metal body is eliminated, and it has a good sound absorption effect. The sound that can be felt is clearer, thicker, and more agitated.

However, the sound insulation effect of the whole vehicle can only be said to be very limited. The frame structure and chassis of a car determine its sound insulation performance. The sound insulation of the whole vehicle can reduce the noise, but it will face the problem of abnormal noise.

Many cars will produce abnormal noises after the sound insulation of the whole vehicle, and the effect of the sound insulation of the whole vehicle is not very obvious.

It depends on the quality of the glass of the vehicle, the material properties of the car body, the quality of the choice of the vehicle sound insulation material, the noise level of the vehicle engine, and the noise level of the vehicle tires.

Depending on the thickness of the vehicle's doors, depending on the sound insulation of the windows, generally speaking, many cars nowadays have very good sound insulation.

It depends on the thickness of the doors, but also on the quietness of the tires. So when we buy a car, we must pay attention to these two aspects.

The thickness of the door, the thickness of the door is very important, which determines whether the sound insulation effect of a vehicle is particularly good.

Car sound insulation is a system of cracking, first of all, to understand the origin of car noise. Generally speaking, when a car is in the driving state, it will produce three types of noise: engine noise (engine noise), wind noise, and road noise (noise caused by tires coming into contact with the ground during driving).

What we usually refer to is generally road noise and machine noise insulation. If the car is fully soundproofed, it is very necessary for those who pay attention to car audio, especially those who pay attention to the auditory effect, because car sound insulation can not only improve the sound quality of the speaker, but also play a role in preventing tire noise, road noise, and wind noise, which can be reduced by about 3 to 5 decibels.

It can also reduce noise, improve sound quality, and keep warm, which can save fuel consumption. But for those who do not pay attention to the sound effect of the slow results, it is not much necessary to do sound insulation, because it does not help the improvement of driving and engine noise, and the source shirt and the phone bill is about 4,000 yuan, and the weight of the body will increase by about 40 kg after the complete car sound insulation, which may have a little impact on the power system and increase the weight.

The effect is definitely there, generally before and after doing the noise in the car with a special decibel meter test to compare, specifically to do sound insulation has the following functions and functions: improve the importance of the Chinese market, the Chinese market as its one. 1. Strengthen the vehicle sheet metal to suppress body vibration, 2. Isolate the multinational automobile group to adjust its strategy to China, improve the noise outside the car for the Chinese market, make the car more comfortable and quiet, 3. Strengthen the door panel box to enhance the sound effect in the car, 4. Perfectly combine with the solar film to achieve the ideal effect of heat insulation, 5. Perfectly combine with the chassis armor to reduce tire and road noise.