Free Bass Guitar A electric guitar pickup is basically much like a dynamic microphone coil. For decades, energetic microphones have been wired with the voice coil attached to the primary of the microphone's transformer, and perhaps not recommended to ground (‘floating'). The microphone's event is usually attached to the wire shield, that will be connected to the microphone amplifier's ground (see Rane's website for more discussion).
By and big, dynamic microphones are extremely calm units consequently of the combination of transformer isolation and healthy, suspended sign lines throughout, as well as shielded, humbucking coils.
So why don't you instruments? Guitars are notoriously plagued by noise. Humbucking pickups are merely an incomplete (though essential!) solution. The most obvious answer would be to float practicing the guitar collection to a balanced output, as being a microphone. The same idea was published that 2001 patent program like this Free Bass Guitar?