Carvin Acoustic Guitar A electric guitar pickup is basically similar to a dynamic microphone coil. For decades, dynamic microphones have already been wired with the style coil attached to the principal of the microphone's transformer, and not referenced to surface (‘floating'). The microphone's case is normally connected to the cable guard, that is connected to the microphone amplifier's ground (see Rane's web site for more discussion).
By and large, dynamic microphones are extremely quiet units consequently of the combination of transformer solitude and healthy, flying sign lines throughout, as well as guarded, humbucking coils.
So why not instruments? Guitars are once affected by noise. Humbucking pickups are just a partial (though crucial!) solution. The obvious alternative is to float the guitar collection to a healthy output, as being a microphone. An identical idea was published this 2001 patent software like this Carvin Acoustic Guitar?