Cry Baby Wah Wah A guitar collection is essentially similar to a dynamic microphone coil. For decades, dynamic microphones have already been wired with the voice coil mounted on the principal of the microphone's transformer, and not called to surface (‘floating'). The microphone's situation is normally attached to the wire guard, which will be linked to the microphone amplifier's surface (see Rane's web site for more discussion).
By and big, energetic microphones are extremely quiet units consequently of the mix of transformer solitude and healthy, floating indication lines all through, in addition to shielded, humbucking coils.
Therefore why not guitars? Instruments are notoriously affected by noise. Humbucking pickups are only an incomplete (though essential!) solution. The obvious answer is to float the guitar collection to a healthy output, being a microphone. An identical strategy was printed this 2001 patent request like this Cry Baby Wah Wah?