Dean Dave Mustaine Vmnt A guitar pickup is actually much like a vibrant mike coil. For decades, energetic microphones have now been wired with the voice coil attached with the primary of the microphone's transformer, and perhaps not introduced to ground (‘floating'). The microphone's event is typically connected to the cable shield, that is linked to the mike amplifier's surface (see Rane's website for more discussion).
By and large, active microphones are very quiet devices as a result of the combination of transformer solitude and healthy, hanging transmission lines for the duration of, along with shielded, humbucking coils.
Therefore why don't you guitars? Guitars are notoriously plagued by noise. Humbucking pickups are only an incomplete (though essential!) solution. Well-known solution would be to float the guitar pickup to a healthy output, being a microphone. The same idea was published this 2001 patent software such as Dean Dave Mustaine Vmnt?