Digital Piano Compare A best guitar pickup is essentially just like an energetic mike coil. For decades, dynamic microphones have already been wired with the voice coil mounted on the principal of the microphone's transformer, and perhaps not called to ground (‘floating'). The microphone's event is normally connected to the wire shield, that is connected to the microphone amplifier's soil (see Rane's internet site for more discussion).
By and big, energetic microphones are extremely calm units as a result of the combination of transformer isolation and balanced, suspended sign lines all through, as well as shielded, humbucking coils.
Therefore why not instruments? Guitars are once overwhelmed by noise. Humbucking pickups are only an incomplete (though essential!) solution. The most obvious answer would be to float the guitar pickup to a balanced result, being a microphone. The same thought was printed this 2001 patent request like this Digital Piano Compare?