John Fogerty Tour A best guitar pickup is basically similar to an energetic microphone coil. For decades, dynamic microphones have already been sent with the voice coil attached with the principal of the microphone's transformer, and not introduced to surface (‘floating'). The microphone's case is typically attached to the cable guard, that will be linked to the mike amplifier's ground (see Rane's site for more discussion).
By and big, active microphones are very calm units consequently of the mixture of transformer solitude and healthy, hanging transmission lines throughout, in addition to guarded, humbucking coils.
So why don't you instruments? Guitars are once overwhelmed by noise. Humbucking pickups are just an incomplete (though essential!) solution. The obvious answer would be to float your guitar pickup to a balanced output, just like a microphone. The same strategy was published this 2001 patent request such as John Fogerty Tour?