Lehle Volume Pedal A electric guitar collection is essentially much like a dynamic microphone coil. For decades, energetic microphones have now been wired with the voice coil attached with the principal of the microphone's transformer, and perhaps not recommended to soil (‘floating'). The microphone's case is normally connected to the wire shield, that will be attached to the mike amplifier's soil (see Rane's website for more discussion).
By and big, dynamic microphones are extremely calm units consequently of the mixture of transformer solitude and healthy, suspended indication lines for the duration of, along with guarded, humbucking coils.
So why not instruments? Guitars are once plagued by noise. Humbucking pickups are only a partial (though important!) solution. The most obvious solution is always to float practicing the guitar pickup to a balanced output, being a microphone. An identical thought was published this 2001 patent request like this Lehle Volume Pedal?