Drum Unit Xerox Machine A guitar pickup is basically just like a powerful mike coil. For many years, dynamic microphones have been sent with the style coil mounted on the principal of the microphone's transformer, and perhaps not referenced to soil (‘floating'). The microphone's case is usually linked to the cable shield, that will be linked to the mike amplifier's floor (see Rane's website for more discussion).
By and big, active microphones are very quiet devices as a result of the combination of transformer solitude and balanced, suspended indication lines through the duration of, along with guarded, humbucking coils.
So why not guitars? Guitars are notoriously plagued by noise. Humbucking pickups are just a partial (though crucial!) solution. The most obvious solution is to float practicing the guitar collection to a balanced production, just like a microphone. An identical thought was printed this 2001 patent application such as Drum Unit Xerox Machine?