Ace Pull A Part A best guitar pickup is actually much like a vibrant microphone coil. For decades, active microphones have already been wired with the voice coil attached with the primary of the microphone's transformer, and not called to surface (‘floating'). The microphone's event is usually attached to the cable shield, which can be connected to the microphone amplifier's floor (see Rane's site for more discussion).
By and large, vibrant microphones are extremely quiet devices as a result of the mixture of transformer solitude and healthy, flying transmission lines through the duration of, in addition to shielded, humbucking coils.
So why don't you instruments? Guitars are notoriously overwhelmed by noise. Humbucking pickups are just an incomplete (though crucial!) solution. Well-known solution is always to move your guitar collection to a balanced output, just like a microphone. A similar idea was printed that 2001 patent application like this Ace Pull A Part?