Stephen Stills Tour A best guitar pickup is essentially much like a dynamic mike coil. For many years, energetic microphones have been sent with the style coil attached to the principal of the microphone's transformer, and maybe not called to ground (‘floating'). The microphone's case is normally connected to the wire shield, which can be linked to the microphone amplifier's surface (see Rane's site for more discussion).
By and big, powerful microphones are extremely calm devices consequently of the combination of transformer solitude and healthy, flying indication lines during, along with shielded, humbucking coils.
Therefore why don't you guitars? Instruments are notoriously overwhelmed by noise. Humbucking pickups are just a partial (though crucial!) solution. Well-known option would be to float the guitar pickup to a healthy output, being a microphone. The same idea was published this 2001 patent program such as Stephen Stills Tour?