ac hum造句

• Humbucking is a design that electrically cancels the effect of any AC hum.
• A funny difference between DC arcs and AC arcs, based on observation, at voltages above 120 V : AC hums, while DC hisses . Edison 04 : 33, 25 September 2006 ( UTC)
• In a humbucker electric guitar pickup or microphone, two coils are used instead of one; they are arranged in opposing polarity so that AC hum induced in the two coils will cancel, while still giving a signal for the movement of the guitar strings or diaphragm.