Alto Sax Jazz Mouthpiece A best guitar pickup is basically similar to a powerful microphone coil. For many years, active microphones have now been sent with the voice coil mounted on the primary of the microphone's transformer, and perhaps not recommended to ground (‘floating'). The microphone's event is normally linked to the wire shield, that is linked to the microphone amplifier's soil (see Rane's website for more discussion).
By and big, active microphones are very quiet products as a result of the mixture of transformer solitude and balanced, flying transmission lines all through, in addition to guarded, humbucking coils.
Therefore why not instruments? Instruments are notoriously affected by noise. Humbucking pickups are only a partial (though crucial!) solution. The obvious answer would be to move the guitar pickup to a healthy result, just like a microphone. A similar thought was printed this 2001 patent application such as Alto Sax Jazz Mouthpiece?