Ursa Vocal Effect A best guitar pickup is actually similar to a dynamic microphone coil. For decades, powerful microphones have now been sent with the style coil mounted on the primary of the microphone's transformer, and maybe not called to soil (‘floating'). The microphone's situation is typically connected to the cable shield, that is linked to the microphone amplifier's floor (see Rane's web site for more discussion).
By and large, active microphones are very calm devices consequently of the combination of transformer solitude and healthy, hanging transmission lines throughout, along with shielded, humbucking coils.
So why don't you guitars? Instruments are notoriously affected by noise. Humbucking pickups are merely a partial (though essential!) solution. The most obvious solution is to float the guitar collection to a balanced output, being a microphone. An identical thought was printed that 2001 patent request like this Ursa Vocal Effect?