Behringer Volume Pedal A guitar pickup is actually much like an energetic mike coil. For decades, dynamic microphones have been wired with the voice coil mounted on the principal of the microphone's transformer, and perhaps not called to surface (‘floating'). The microphone's case is normally attached to the cable guard, that is attached to the mike amplifier's floor (see Rane's website for more discussion).
By and large, vibrant microphones are extremely quiet products as a result of the combination of transformer isolation and healthy, hanging sign lines through the duration of, as well as guarded, humbucking coils.
So why don't you instruments? Instruments are once plagued by noise. Humbucking pickups are merely a partial (though important!) solution. Well-known solution is always to move the guitar collection to a balanced production, just like a microphone. An identical strategy was printed that 2001 patent application like this Behringer Volume Pedal?