Labella Bass String A best guitar pickup is actually similar to an energetic microphone coil. For decades, dynamic microphones have now been sent with the voice coil attached to the principal of the microphone's transformer, and not introduced to soil (‘floating'). The microphone's event is typically connected to the cable shield, that will be attached to the microphone amplifier's surface (see Rane's website for more discussion).
By and large, powerful microphones are extremely calm products as a result of the mix of transformer isolation and healthy, flying sign lines throughout, as well as guarded, humbucking coils.
Therefore why not guitars? Instruments are notoriously affected by noise. Humbucking pickups are merely an incomplete (though crucial!) solution. Well-known solution would be to move your guitar pickup to a healthy result, just like a microphone. The same strategy was printed this 2001 patent request like this Labella Bass String?