You Tube Frank Zappa A electric guitar pickup is basically much like a vibrant mike coil. For decades, energetic microphones have been sent with the voice coil mounted on the primary of the microphone's transformer, and not called to soil (‘floating'). The microphone's case is typically linked to the cable shield, which is attached to the mike amplifier's floor (see Rane's web site for more discussion).
By and large, powerful microphones are very calm devices consequently of the mix of transformer solitude and healthy, hanging indication lines throughout, along with guarded, humbucking coils.
So why don't you instruments? Guitars are notoriously overwhelmed by noise. Humbucking pickups are just a partial (though crucial!) solution. Well-known answer would be to float the guitar collection to a balanced production, just like a microphone. A similar thought was published this 2001 patent application like this You Tube Frank Zappa?