The Best Of Eric Clapton A guitar pickup is essentially similar to a powerful mike coil. For many years, active microphones have now been wired with the style coil mounted on the primary of the microphone's transformer, and perhaps not introduced to soil (‘floating'). The microphone's event is normally linked to the cable shield, that is connected to the microphone amplifier's surface (see Rane's website for more discussion).
By and big, energetic microphones are very calm devices consequently of the mixture of transformer solitude and balanced, hanging sign lines throughout, in addition to guarded, humbucking coils.
Therefore why not instruments? Instruments are notoriously overwhelmed by noise. Humbucking pickups are merely an incomplete (though essential!) solution. The obvious solution would be to float practicing the guitar collection to a healthy production, being a microphone. The same idea was published this 2001 patent application like this The Best Of Eric Clapton?