Black Sabbath 13 Album A guitar collection is actually similar to an energetic microphone coil. For decades, energetic microphones have already been wired with the voice coil attached with the principal of the microphone's transformer, and perhaps not referenced to ground (‘floating'). The microphone's case is normally linked to the cable shield, that is attached to the mike amplifier's ground (see Rane's site for more discussion).
By and large, powerful microphones are extremely calm products as a result of the combination of transformer solitude and healthy, hanging indication lines through the duration of, in addition to guarded, humbucking coils.
Therefore why not instruments? Guitars are notoriously affected by noise. Humbucking pickups are just an incomplete (though essential!) solution. Well-known answer would be to float your guitar pickup to a balanced productivity, just like a microphone. An identical idea was published that 2001 patent request like this Black Sabbath 13 Album?