Avid 11 Rack A electric guitar pickup is basically just like a vibrant mike coil. For decades, active microphones have already been wired with the voice coil attached to the principal of the microphone's transformer, and perhaps not referenced to floor (‘floating'). The microphone's case is normally attached to the cable guard, that is linked to the microphone amplifier's surface (see Rane's site for more discussion).
By and big, active microphones are extremely calm products as a result of the mix of transformer isolation and healthy, hanging sign lines during, in addition to protected, humbucking coils.
So why don't you instruments? Instruments are once plagued by noise. Humbucking pickups are just a partial (though essential!) solution. Well-known solution is to move practicing the guitar collection to a balanced productivity, as being a microphone. An identical idea was printed this 2001 patent application such as Avid 11 Rack?