Mains hum
ELECTRIC OR ELECTROMAGNETIC PHENOMENON
Humbucking; 60 Hz hum; 60 hz hum; 60hz hum; Ground loop hum; Power line hum; Electric hum; Cycle hum; 50-cycle hum; 50hz hum; Ground hum; Transformer hum; Hum bar
Mains hum, electric hum, cycle hum, or power line hum is a sound associated with alternating current which is twice the frequency of the mains electricity. The fundamental frequency of this sound is usually double that of fundamental 50/60Hz, i.