Zoom Guitar Effects 2019 A best guitar pickup is basically similar to a powerful microphone coil. For many years, active microphones have now been wired with the style coil mounted on the primary of the microphone's transformer, and maybe not referenced to floor (‘floating'). The microphone's case is usually attached to the wire guard, which can be connected to the microphone amplifier's ground (see Rane's site for more discussion).
By and large, powerful microphones are extremely quiet devices as a result of the mix of transformer isolation and healthy, floating transmission lines all through, as well as shielded, humbucking coils.
Therefore why not guitars? Instruments are notoriously affected by noise. Humbucking pickups are just a partial (though essential!) solution. The obvious alternative is to move your guitar pickup to a balanced production, being a microphone. The same thought was printed this 2001 patent application such as Zoom Guitar Effects 2019?