Guitar Building Workshop A guitar pickup is essentially similar to a dynamic mike coil. For decades, dynamic microphones have been wired with the style coil mounted on the primary of the microphone's transformer, and perhaps not referenced to floor (‘floating'). The microphone's case is typically linked to the cable shield, that is linked to the microphone amplifier's ground (see Rane's web site for more discussion).
By and large, active microphones are extremely quiet units as a result of the mixture of transformer isolation and balanced, suspended sign lines through the duration of, along with shielded, humbucking coils.
Therefore why don't you instruments? Instruments are notoriously affected by noise. Humbucking pickups are just an incomplete (though important!) solution. The most obvious option is to float the guitar collection to a healthy production, being a microphone. The same thought was printed this 2001 patent request such as Guitar Building Workshop?