Cheap Acoustic Basses A guitar pickup is basically similar to an energetic microphone coil. For decades, dynamic microphones have been sent with the voice coil mounted on the principal of the microphone's transformer, and maybe not called to ground (‘floating'). The microphone's situation is typically attached to the cable shield, which will be linked to the microphone amplifier's surface (see Rane's website for more discussion).
By and large, energetic microphones are very calm units consequently of the mix of transformer solitude and healthy, hanging indication lines during, as well as protected, humbucking coils.
Therefore why not instruments? Guitars are notoriously affected by noise. Humbucking pickups are merely an incomplete (though important!) solution. The obvious solution is to float your guitar pickup to a healthy result, as being a microphone. An identical thought was published this 2001 patent application such as Cheap Acoustic Basses?