Si Performer 3 A electric guitar pickup is actually much like a dynamic mike coil. For decades, vibrant microphones have already been sent with the voice coil attached to the principal of the microphone's transformer, and maybe not referenced to surface (‘floating'). The microphone's situation is normally attached to the cable shield, that is attached to the mike amplifier's ground (see Rane's website for more discussion).
By and large, active microphones are extremely calm products consequently of the mix of transformer solitude and healthy, suspended transmission lines all through, in addition to shielded, humbucking coils.
Therefore why not guitars? Guitars are once plagued by noise. Humbucking pickups are only a partial (though crucial!) solution. Well-known answer is always to float practicing the guitar pickup to a healthy result, just like a microphone. A similar thought was published this 2001 patent software like this Si Performer 3?