Numark Pt01 Scratch A electric guitar pickup is basically just like a dynamic microphone coil. For decades, active microphones have now been sent with the style coil mounted on the primary of the microphone's transformer, and not recommended to floor (‘floating'). The microphone's event is typically connected to the cable shield, that is connected to the microphone amplifier's ground (see Rane's website for more discussion).
By and big, vibrant microphones are very quiet products as a result of the mix of transformer isolation and healthy, flying indication lines throughout, as well as shielded, humbucking coils.
So why don't you guitars? Instruments are notoriously affected by noise. Humbucking pickups are merely a partial (though important!) solution. The obvious alternative would be to float your guitar collection to a healthy productivity, being a microphone. A similar thought was printed that 2001 patent program such as Numark Pt01 Scratch?