Martin 000 15sm Review A electric guitar collection is basically much like an energetic microphone coil. For many years, active microphones have already been wired with the voice coil attached to the principal of the microphone's transformer, and not introduced to surface (‘floating'). The microphone's case is typically attached to the cable shield, which is connected to the mike amplifier's soil (see Rane's web site for more discussion).
By and big, dynamic microphones are very quiet products as a result of the combination of transformer solitude and balanced, floating indication lines for the duration of, along with shielded, humbucking coils.
Therefore why not guitars? Instruments are once overwhelmed by noise. Humbucking pickups are just a partial (though crucial!) solution. The obvious option would be to float the guitar pickup to a healthy output, being a microphone. A similar strategy was printed this 2001 patent application such as Martin 000 15sm Review?