Collectors Choice Video A electric guitar pickup is basically just like a dynamic mike coil. For decades, dynamic microphones have now been sent with the style coil mounted on the primary of the microphone's transformer, and not referenced to surface (‘floating'). The microphone's case is usually connected to the wire shield, which is linked to the microphone amplifier's ground (see Rane's web site for more discussion).
By and big, energetic microphones are very calm products consequently of the combination of transformer isolation and healthy, hanging sign lines throughout, as well as protected, humbucking coils.
Therefore why not instruments? Guitars are notoriously affected by noise. Humbucking pickups are just a partial (though crucial!) solution. The most obvious answer is always to move the guitar collection to a balanced production, just like a microphone. An identical thought was published that 2001 patent request like this Collectors Choice Video?