Bryan Sutton Guitar A electric guitar pickup is actually much like a vibrant mike coil. For decades, active microphones have been wired with the voice coil attached with the primary of the microphone's transformer, and maybe not recommended to ground (‘floating'). The microphone's situation is normally connected to the cable shield, that is attached to the mike amplifier's soil (see Rane's site for more discussion).
By and large, dynamic microphones are extremely calm products as a result of the combination of transformer isolation and balanced, suspended indication lines for the duration of, along with shielded, humbucking coils.
So why don't you instruments? Instruments are notoriously affected by noise. Humbucking pickups are merely a partial (though essential!) solution. The most obvious option would be to float practicing the guitar collection to a balanced result, being a microphone. The same thought was printed this 2001 patent program like this Bryan Sutton Guitar?