Weighted Keys Piano A electric guitar pickup is basically just like a powerful microphone coil. For decades, dynamic microphones have already been wired with the style coil attached to the primary of the microphone's transformer, and maybe not referenced to floor (‘floating'). The microphone's case is usually connected to the wire shield, that is connected to the microphone amplifier's soil (see Rane's website for more discussion).
By and big, powerful microphones are very quiet units consequently of the mixture of transformer solitude and balanced, flying transmission lines during, in addition to guarded, humbucking coils.
Therefore why don't you instruments? Guitars are once affected by noise. Humbucking pickups are just an incomplete (though important!) solution. The obvious option would be to float the guitar pickup to a balanced result, being a microphone. A similar strategy was printed that 2001 patent program such as Weighted Keys Piano?