Motor

Switching on a servo motor, then switching off, howling and rattling sound.

Switching on a servo motor, then immediately switching off, fast buzzing sound.

Switching on a servo motor, then switching off, rattling sound.

Switching a small servo motor on, then immediately switching off, low and scratchy sound.

Switching a small servo motor on, then immediately switching off.

Switching on a servo motor, then switching off, drilling unpleasant sound.

Crying and rattling servo motor.

Switching a small servo motor on, then immediately switching off.

Short sound of a buzzing servo motor.

Buzzing servo motor with humming and oscillating sound, long.

Single engine of a go kart is revving.

Switching on a servo motor, then switching off, humming sound.