Snare Drum About A guitar pickup is essentially similar to a powerful microphone coil. For many years, vibrant microphones have already been wired with the voice coil attached with the primary of the microphone's transformer, and perhaps not introduced to soil (‘floating'). The microphone's case is typically connected to the cable guard, which is attached to the microphone amplifier's soil (see Rane's site for more discussion).
By and big, vibrant microphones are extremely calm products consequently of the combination of transformer isolation and balanced, flying indication lines throughout, as well as shielded, humbucking coils.
So why not instruments? Instruments are notoriously affected by noise. Humbucking pickups are only a partial (though essential!) solution. The obvious solution is always to move the guitar pickup to a healthy output, just like a microphone. A similar thought was published this 2001 patent request such as Snare Drum About?