Black And White Acoustic Guitar A guitar pickup is actually much like an energetic microphone coil. For many years, energetic microphones have now been wired with the voice coil attached to the principal of the microphone's transformer, and not recommended to soil (‘floating'). The microphone's situation is typically attached to the wire guard, which will be linked to the microphone amplifier's ground (see Rane's site for more discussion).
By and big, powerful microphones are very calm units as a result of the combination of transformer solitude and balanced, suspended sign lines for the duration of, along with shielded, humbucking coils.
Therefore why not guitars? Instruments are notoriously plagued by noise. Humbucking pickups are only a partial (though crucial!) solution. The obvious option is to move your guitar pickup to a healthy result, being a microphone. A similar idea was published this 2001 patent program like this Black And White Acoustic Guitar?