Chameleon Lab 7602 A electric guitar pickup is actually much like a powerful microphone coil. For many years, powerful microphones have been wired with the voice coil attached to the primary of the microphone's transformer, and maybe not called to ground (‘floating'). The microphone's case is normally connected to the cable shield, which can be connected to the microphone amplifier's soil (see Rane's website for more discussion).
By and large, vibrant microphones are extremely calm devices as a result of the mix of transformer solitude and balanced, floating transmission lines for the duration of, in addition to guarded, humbucking coils.
So why not guitars? Guitars are notoriously plagued by noise. Humbucking pickups are just an incomplete (though important!) solution. The obvious alternative is to float the guitar collection to a healthy output, being a microphone. An identical thought was printed this 2001 patent request such as Chameleon Lab 7602?