What causes the buzzing sound heard in the car cabin?

[Gemma]

Car hearing a buzzing sound in the cabin is generally caused by aging engine mounts. Here is the relevant introduction about car engine mounts: 1. Function: The car's engine is not directly connected to the frame. There are rubber engine mounts at the connection points between the engine and the frame. The function of these mounts is to absorb vibrations, preventing the engine's vibrations from being directly transmitted to the car body. 2. Material: Rubber products will age over time with prolonged use. After aging, rubber engine mounts will harden. When the mounts harden, some vibrations can be felt inside the car.