Why is there noise from the car wiper?

[Allie]

Noise from the car wiper is usually caused by the wiper blade itself, which can become aged and hardened after prolonged use. Wiper System: The wiper system is driven by a motor, which converts the rotational motion into a reciprocating motion of the wiper arm (the part other than the blade on the windshield) through a linkage mechanism, thereby achieving the wiping action. Wiper Structure: The wiper assembly consists of a motor, reducer, four-bar linkage, wiper arm spindle, wiper blade assembly, etc. When the driver presses the wiper switch, the motor starts. The motor's speed is increased in torque and reduced in speed by the worm gear mechanism, driving the swing arm. The swing arm then moves the four-bar linkage, which causes the shaft mounted on the front panel to swing left and right. Finally, the shaft drives the wiper blade to sweep across the windshield.