Fender Bass 5 String White A electric guitar pickup is basically much like an energetic mike coil. For decades, energetic microphones have now been wired with the style coil mounted on the primary of the microphone's transformer, and maybe not introduced to surface (‘floating'). The microphone's case is normally connected to the cable guard, which can be attached to the mike amplifier's ground (see Rane's website for more discussion).
By and big, active microphones are extremely calm devices as a result of the mix of transformer solitude and balanced, flying transmission lines all through, as well as guarded, humbucking coils.
So why don't you guitars? Instruments are notoriously plagued by noise. Humbucking pickups are merely an incomplete (though essential!) solution. The obvious alternative is always to float practicing the guitar collection to a healthy result, being a microphone. A similar thought was published that 2001 patent application such as Fender Bass 5 String White?