Seymour Duncan Sh 11 A best guitar pickup is basically much like an energetic microphone coil. For many years, powerful microphones have already been sent with the style coil mounted on the primary of the microphone's transformer, and maybe not recommended to ground (‘floating'). The microphone's situation is normally connected to the cable shield, that will be attached to the mike amplifier's floor (see Rane's internet site for more discussion).
By and big, active microphones are very calm products as a result of the mixture of transformer isolation and balanced, hanging transmission lines throughout, along with shielded, humbucking coils.
So why not instruments? Instruments are notoriously plagued by noise. Humbucking pickups are just a partial (though essential!) solution. The obvious answer is to float your guitar collection to a healthy result, just like a microphone. An identical thought was printed this 2001 patent request like this Seymour Duncan Sh 11?