You Tube Tom Petty A electric guitar collection is actually similar to a powerful mike coil. For many years, dynamic microphones have been sent with the voice coil mounted on the primary of the microphone's transformer, and perhaps not called to ground (‘floating'). The microphone's case is typically attached to the cable guard, that is linked to the mike amplifier's surface (see Rane's website for more discussion).
By and big, powerful microphones are very calm devices consequently of the mixture of transformer solitude and healthy, floating transmission lines all through, as well as guarded, humbucking coils.
Therefore why don't you guitars? Instruments are once affected by noise. Humbucking pickups are merely an incomplete (though important!) solution. The obvious option is always to move your guitar collection to a balanced output, just like a microphone. A similar thought was printed that 2001 patent application like this You Tube Tom Petty?