Electric Guitar String Action Adjustment A electric guitar pickup is basically much like a vibrant microphone coil. For many years, powerful microphones have been sent with the voice coil attached to the primary of the microphone's transformer, and maybe not recommended to surface (‘floating'). The microphone's case is usually connected to the wire shield, that will be attached to the mike amplifier's ground (see Rane's website for more discussion).
By and big, energetic microphones are extremely calm devices as a result of the mix of transformer isolation and healthy, hanging sign lines throughout, as well as guarded, humbucking coils.
So why not instruments? Guitars are once overwhelmed by noise. Humbucking pickups are just an incomplete (though crucial!) solution. The most obvious answer is always to float the guitar pickup to a healthy output, just like a microphone. A similar idea was published that 2001 patent program such as Electric Guitar String Action Adjustment?