Guitar Wiring Three Way Switch A guitar pickup is basically much like a dynamic microphone coil. For decades, vibrant microphones have been sent with the style coil mounted on the primary of the microphone's transformer, and maybe not recommended to surface (‘floating'). The microphone's case is typically connected to the wire guard, which can be attached to the mike amplifier's floor (see Rane's website for more discussion).
By and big, active microphones are very quiet products as a result of the combination of transformer isolation and healthy, floating sign lines through the duration of, along with shielded, humbucking coils.
Therefore why not instruments? Instruments are once affected by noise. Humbucking pickups are merely an incomplete (though crucial!) solution. The most obvious option is always to move the guitar collection to a balanced result, as being a microphone. A similar idea was published this 2001 patent software such as Guitar Wiring Three Way Switch?