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10.05.2021 13:42 -
The main source of car noise
When a car is driving, noise will affect driving. In severe cases, it may even make people irritable, reduce concentration, and affect safety. In the face of noise from different sources, the Car Audio & Video Wiring Harnesses tape provides targeted noise reduction to improve driving comfort and safety. As a power output device, the roar of the engine is one of the main sources of noise. In addition, it also includes the noise of the air intake system. These noises are mainly generated and transmitted by the front fender, hood, fire wall, and exhaust pipe. The tire noise is generally caused by the air noise formed by the tread gap and the air disturbance around the tire. Secondly, the tire vibration noise caused by the vibration of the carcass and the pattern is also a big influence factor. Of course, tire noise is also inseparable from the road conditions. Wind noise is the sound generated by the friction between the air and the gaps and corners of the vehicle during the driving process. The faster the driving speed, the more obvious it is. This has a great relationship with the wind resistance coefficient of the car design. It is mainly produced and transmitted by the four-door gap, including the whole thin steel plate. In addition to the above main noise sources, the fixed tolerances and seam gaps of numerous parts inside the car are also influencing factors that cannot be ignored. After all, various high and low frequency bumps and vibrations are inevitable when the car is driving. Once there are parts that collide and shake inside the car body to produce abnormal noise, the comfort of the riding experience will be greatly reduced. The most important way of noise reduction: passive noise control, that is, by installing sealed sound-absorbing and sound-absorbing materials, including installing vibration-absorbing and sound-absorbing materials on the car floor, engine compartment, door, trunk, wheel fender, hood plate, etc. . Secondly, in the connecting and sealing parts of the parts, especially the most direct position of friction and vibration, properly install fixed sealing materials, such as installing rubber sealing strips at the door sunroof, and fixing the roof wire harness felt material.
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