Car noise source analysis and how to suppress the main noise source
The noise of a car is mainly divided into its own noise and external noise. It can be said that there is no difference between its own noise and the noise generated by external road friction and air friction. But in terms of its own noise, the operation of the engine is the main source of noise. The causes of noise, whether internal or external, primary or secondary, we manage and suppress them in a targeted manner.
When we drive, we all hope to have a quiet driving environment in the car. We either listen to the radio or listen to music. Sometimes things are counterproductive. There are various noises in our car. Why do we So much noise, so much? Where do they all come from?
First of all, the noise comes from itself. The car is a machine, and the machine must have an engine, a transmission system, a brake system, and other systems to form a complete vehicle, including the air-conditioning system commonly used in summer. These systems are running Mechanical noise will be produced more or less every time, and this noise is directly proportional to the speed. Most parts of the car, including the frame of the whole car, are made of metal, and the ability of metal to transmit noise is very strong, so the noise from the car itself cannot be ignored.
Secondly, from the outside of the vehicle, it is the friction noise between the ground and the tires, which is called tire noise. Poor road conditions are the main reason for increased tire noise, and vehicle speed is also one of the reasons. The noise generated by the friction between air and vehicles is called aerodynamic noise. Aerodynamic noise is divided into wind noise and cavity resonance, which are related to the manufacturing process of the vehicle, the sealing of the door, and the speed of the vehicle.
Once we understand the source of noise inside the car, we can eliminate such noise as much as possible. For example, try not to open the windows when driving, especially at high speeds, to reduce wind noise, and do not turn on the air conditioner in the car too much. , the speed should be moderate, not too high can reduce noise. In addition, do some understanding of the car assembly process before buying a car. Generally, the precision of imported cars is better than domestic cars, and big brands are better than small brands. The higher the price, the better the quietness of the car.
