Guitar Pickups Sustain A guitar collection is basically much like a dynamic microphone coil. For decades, dynamic microphones have been sent with the voice coil attached with the principal of the microphone's transformer, and perhaps not called to ground (‘floating'). The microphone's case is typically attached to the wire shield, that will be linked to the mike amplifier's soil (see Rane's site for more discussion).
By and big, dynamic microphones are very quiet devices consequently of the mix of transformer solitude and healthy, flying sign lines throughout, in addition to protected, humbucking coils.
So why don't you instruments? Guitars are notoriously plagued by noise. Humbucking pickups are only a partial (though essential!) solution. The obvious option would be to move the guitar pickup to a balanced result, as being a microphone. A similar idea was published that 2001 patent software like this Guitar Pickups Sustain?