Martin D 15m A guitar pickup is basically just like a dynamic mike coil. For many years, powerful microphones have been wired with the style coil attached to the principal of the microphone's transformer, and maybe not called to soil (‘floating'). The microphone's situation is typically linked to the wire shield, which will be attached to the microphone amplifier's ground (see Rane's internet site for more discussion).
By and large, vibrant microphones are extremely calm products consequently of the combination of transformer isolation and balanced, flying transmission lines during, in addition to shielded, humbucking coils.
So why not guitars? Instruments are notoriously overwhelmed by noise. Humbucking pickups are just a partial (though important!) solution. The obvious solution is always to float your guitar pickup to a balanced output, being a microphone. A similar idea was printed that 2001 patent program like this Martin D 15m?