Audio Technica At897 A electric guitar pickup is essentially similar to a dynamic mike coil. For many years, vibrant microphones have now been sent with the style coil mounted on the principal of the microphone's transformer, and maybe not called to ground (‘floating'). The microphone's event is normally attached to the cable shield, which is linked to the microphone amplifier's surface (see Rane's website for more discussion).
By and large, powerful microphones are extremely quiet devices as a result of the combination of transformer solitude and balanced, suspended transmission lines all through, in addition to shielded, humbucking coils.
Therefore why not guitars? Instruments are once overwhelmed by noise. Humbucking pickups are merely a partial (though important!) solution. Well-known answer would be to float the guitar pickup to a balanced output, being a microphone. A similar idea was published this 2001 patent software such as Audio Technica At897?