Helium Vocal Effect A guitar pickup is basically just like a powerful microphone coil. For many years, energetic microphones have already been wired with the voice coil attached with the principal of the microphone's transformer, and maybe not called to soil (‘floating'). The microphone's situation is typically attached to the cable shield, which is linked to the microphone amplifier's surface (see Rane's site for more discussion).
By and large, powerful microphones are extremely quiet devices consequently of the mixture of transformer isolation and balanced, flying indication lines during, as well as protected, humbucking coils.
Therefore why don't you instruments? Guitars are once overwhelmed by noise. Humbucking pickups are just an incomplete (though essential!) solution. The obvious option is to float practicing the guitar pickup to a balanced output, just like a microphone. The same idea was published this 2001 patent program like this Helium Vocal Effect?