What Causes the Buzzing Sound in a Car?

[McBennett]

The reason for the buzzing sound in a car is that excessive tire pressure reduces the contact area between the car tires and the ground. Factors affecting tire pressure are as follows: Load Capacity: For empty or half loads, refer to the lower limit of the tire pressure indicated on the vehicle's sticker as a reference value; for full loads, refer to the upper limit of the tire pressure indicated on the vehicle's sticker as a reference value. Tire Pressure Measurement Environment: The difference between cold tires and hot tires is approximately 0.2-0.3. To obtain an accurate tire pressure value, subtract 0.2-0.3 from the pressure measured in hot tires to get the tire's cooled inflation pressure. Driving Conditions: If you frequently drive long distances on highways, the tire pressure should not be too low. It is appropriate to increase the standard tire pressure by about 0.2. If you frequently drive on rough roads, it is appropriate to decrease the standard tire pressure by about 0.1-0.2. Under normal circumstances, this can be negligible.