Neumann Condenser Mics A guitar pickup is essentially similar to an energetic mike coil. For many years, energetic microphones have been sent with the style coil mounted on the primary of the microphone's transformer, and not called to surface (‘floating'). The microphone's case is normally linked to the cable shield, which will be connected to the microphone amplifier's ground (see Rane's site for more discussion).
By and big, dynamic microphones are very quiet units consequently of the combination of transformer solitude and healthy, hanging sign lines all through, in addition to guarded, humbucking coils.
Therefore why don't you guitars? Instruments are notoriously overwhelmed by noise. Humbucking pickups are merely an incomplete (though important!) solution. Well-known option would be to float the guitar pickup to a healthy productivity, being a microphone. An identical idea was published this 2001 patent request like this Neumann Condenser Mics?