Mxl 990 Shock Mount A best guitar pickup is basically just like a powerful microphone coil. For many years, active microphones have been wired with the style coil attached to the primary of the microphone's transformer, and maybe not recommended to surface (‘floating'). The microphone's situation is normally attached to the wire guard, which will be linked to the mike amplifier's surface (see Rane's web site for more discussion).
By and big, energetic microphones are extremely calm units consequently of the combination of transformer isolation and healthy, flying sign lines for the duration of, along with shielded, humbucking coils.
So why don't you guitars? Guitars are once affected by noise. Humbucking pickups are just an incomplete (though important!) solution. The most obvious answer is to float the guitar collection to a balanced output, being a microphone. A similar idea was published that 2001 patent software like this Mxl 990 Shock Mount?