Line 6 Floorboards A guitar pickup is actually much like a vibrant microphone coil. For many years, active microphones have been sent with the style coil mounted on the principal of the microphone's transformer, and maybe not called to floor (‘floating'). The microphone's situation is normally attached to the wire shield, which is linked to the microphone amplifier's surface (see Rane's web site for more discussion).
By and big, vibrant microphones are extremely calm products consequently of the mixture of transformer isolation and balanced, flying sign lines all through, in addition to guarded, humbucking coils.
So why don't you guitars? Instruments are notoriously affected by noise. Humbucking pickups are just a partial (though essential!) solution. The most obvious answer is always to float the guitar collection to a balanced result, being a microphone. A similar thought was published this 2001 patent software such as Line 6 Floorboards?