What Year Did Jimi Hendrix Die A electric guitar pickup is essentially much like an energetic mike coil. For decades, energetic microphones have already been wired with the voice coil attached with the principal of the microphone's transformer, and maybe not introduced to soil (‘floating'). The microphone's situation is normally attached to the cable guard, that is connected to the mike amplifier's soil (see Rane's site for more discussion).
By and large, energetic microphones are extremely quiet devices as a result of the combination of transformer solitude and balanced, flying sign lines during, in addition to guarded, humbucking coils.
So why not guitars? Instruments are once affected by noise. Humbucking pickups are just an incomplete (though important!) solution. The obvious alternative is always to float the guitar pickup to a healthy result, just like a microphone. An identical idea was printed that 2001 patent software like this What Year Did Jimi Hendrix Die?