Voodoo Lab Ground Control A guitar pickup is essentially just like a powerful microphone coil. For decades, energetic microphones have already been sent with the style coil mounted on the primary of the microphone's transformer, and perhaps not recommended to soil (‘floating'). The microphone's event is typically connected to the cable guard, which will be connected to the mike amplifier's floor (see Rane's site for more discussion).
By and large, dynamic microphones are very calm products as a result of the combination of transformer isolation and balanced, flying indication lines for the duration of, as well as protected, humbucking coils.
Therefore why not guitars? Instruments are notoriously overwhelmed by noise. Humbucking pickups are only an incomplete (though essential!) solution. The obvious answer is to float your guitar collection to a healthy result, being a microphone. A similar thought was printed this 2001 patent application like this Voodoo Lab Ground Control?