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Why does the car make a humming noise at low speeds?

1 Answers

CaliMarie

07/29/25 6:04pm

The reasons for a car making a humming noise at low speeds are as follows: 1. Engine noise: The noise from the vehicle's engine varies with different engine speeds. 2. Road noise: Road noise occurs when the vehicle is moving at high speeds, caused by wind cutting in and creating noise, as well as vibrations from the chassis being driven. Additionally, gravel and sand hitting the car's chassis can also produce noise. 3. Tire noise: Tire noise is generated when the vehicle is moving at high speeds due to friction between the tires and the road surface. The level of tire noise depends on road and vehicle conditions; worse road conditions lead to louder tire noise. Moreover, there is a significant difference in tire noise between asphalt and concrete roads. 4. Wind noise: Wind noise refers to the pressure of oncoming wind exceeding the sealing resistance of the car doors and entering the cabin when the car is moving at high speeds. The faster the speed, the louder the wind noise. 5. Resonance noise and others: The car body itself acts like a box, and sound has the properties of refraction and overlapping. When sound enters the cabin, without sound-absorbing and sound-insulating materials to absorb and block it, the noise will continuously refract and overlap, forming resonance noise.

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