Mild to moderate humming and buzzing. We can hear the slight vibration and rapid movements of the shaver parts that rotate and move for shaving purposes. The sound itself may be constant and slightly monotonous, with a periodic motion as the shaving head moves across the surface of the skin. Overall, the sound of an electric shaver can be characterized as a mechanical, gently pulsating sound with a low to medium volume that gives the impression of a precise and repetitive shave.