Bruce Springsteen Paul Mccartney A electric guitar collection is basically similar to a powerful microphone coil. For decades, active microphones have already been sent with the voice coil attached to the principal of the microphone's transformer, and not referenced to ground (‘floating'). The microphone's situation is normally connected to the wire guard, that is linked to the microphone amplifier's floor (see Rane's web site for more discussion).
By and big, powerful microphones are very calm units consequently of the mixture of transformer solitude and healthy, flying transmission lines during, in addition to shielded, humbucking coils.
Therefore why not instruments? Instruments are notoriously overwhelmed by noise. Humbucking pickups are only a partial (though crucial!) solution. The most obvious answer is to move your guitar collection to a balanced result, just like a microphone. A similar idea was printed that 2001 patent application such as Bruce Springsteen Paul Mccartney?