High Gear Ratio Guitar Tuners A guitar pickup is essentially just like a dynamic mike coil. For decades, dynamic microphones have already been sent with the style coil attached to the principal of the microphone's transformer, and perhaps not recommended to ground (‘floating'). The microphone's case is normally linked to the wire shield, that will be connected to the mike amplifier's soil (see Rane's site for more discussion).
By and large, powerful microphones are very quiet units consequently of the mix of transformer solitude and healthy, suspended sign lines through the duration of, in addition to protected, humbucking coils.
Therefore why not instruments? Guitars are once overwhelmed by noise. Humbucking pickups are just a partial (though important!) solution. The most obvious answer would be to move the guitar pickup to a healthy result, being a microphone. A similar idea was printed this 2001 patent application like this High Gear Ratio Guitar Tuners?