Snare Drum Keychain A guitar pickup is actually similar to a dynamic mike coil. For many years, vibrant microphones have already been sent with the voice coil attached with the principal of the microphone's transformer, and not called to soil (‘floating'). The microphone's event is typically attached to the wire shield, that is connected to the microphone amplifier's floor (see Rane's site for more discussion).
By and large, active microphones are extremely calm devices consequently of the combination of transformer isolation and healthy, flying sign lines during, along with protected, humbucking coils.
So why not guitars? Instruments are notoriously overwhelmed by noise. Humbucking pickups are only a partial (though important!) solution. The obvious option would be to move the guitar collection to a balanced output, as being a microphone. A similar thought was printed that 2001 patent software like this Snare Drum Keychain?