Line 6 Audio Interface A best guitar pickup is basically similar to an energetic microphone coil. For many years, active microphones have now been sent with the style coil attached to the principal of the microphone's transformer, and maybe not introduced to floor (‘floating'). The microphone's situation is normally connected to the cable guard, that is attached to the microphone amplifier's soil (see Rane's web site for more discussion).
By and big, powerful microphones are extremely calm devices as a result of the combination of transformer isolation and healthy, suspended sign lines for the duration of, as well as guarded, humbucking coils.
So why don't you guitars? Guitars are notoriously affected by noise. Humbucking pickups are merely an incomplete (though important!) solution. Well-known alternative would be to float the guitar pickup to a balanced productivity, just like a microphone. An identical strategy was printed this 2001 patent application such as Line 6 Audio Interface?