Devin Townsend Framus A electric guitar pickup is actually much like a vibrant microphone coil. For decades, dynamic microphones have been sent with the voice coil attached to the primary of the microphone's transformer, and not introduced to soil (‘floating'). The microphone's situation is typically connected to the wire guard, which will be linked to the microphone amplifier's soil (see Rane's site for more discussion).
By and large, energetic microphones are extremely quiet units consequently of the combination of transformer isolation and healthy, hanging transmission lines throughout, along with protected, humbucking coils.
Therefore why don't you instruments? Guitars are notoriously affected by noise. Humbucking pickups are merely a partial (though crucial!) solution. Well-known answer is to float practicing the guitar collection to a healthy result, as being a microphone. A similar thought was printed this 2001 patent software such as Devin Townsend Framus?