Gibson Les Paul Standard Ebony A guitar pickup is basically just like a dynamic mike coil. For decades, dynamic microphones have been sent with the style coil attached with the principal of the microphone's transformer, and not introduced to floor (‘floating'). The microphone's event is typically attached to the wire shield, that will be connected to the mike amplifier's soil (see Rane's site for more discussion).
By and large, active microphones are very calm products as a result of the mix of transformer solitude and balanced, floating transmission lines all through, as well as protected, humbucking coils.
So why don't you guitars? Guitars are notoriously plagued by noise. Humbucking pickups are only a partial (though important!) solution. The most obvious option is always to float practicing the guitar pickup to a healthy output, as being a microphone. A similar strategy was printed that 2001 patent software like this Gibson Les Paul Standard Ebony?