Electrical Guitar Company Tyranny A guitar pickup is essentially just like an energetic microphone coil. For decades, powerful microphones have been sent with the voice coil attached to the primary of the microphone's transformer, and perhaps not introduced to ground (‘floating'). The microphone's situation is normally attached to the cable guard, which will be linked to the microphone amplifier's ground (see Rane's website for more discussion).
By and big, energetic microphones are very calm units as a result of the mixture of transformer isolation and healthy, flying indication lines all through, as well as protected, humbucking coils.
Therefore why not instruments? Instruments are notoriously affected by noise. Humbucking pickups are merely an incomplete (though important!) solution. The most obvious alternative would be to float the guitar pickup to a healthy output, being a microphone. An identical idea was published this 2001 patent software such as Electrical Guitar Company Tyranny?