David Gilmour Live At Pompeii Dvd A best guitar pickup is essentially much like a vibrant microphone coil. For decades, energetic microphones have now been wired with the style coil attached with the primary of the microphone's transformer, and not introduced to ground (‘floating'). The microphone's case is typically linked to the cable guard, that will be connected to the mike amplifier's floor (see Rane's web site for more discussion).
By and large, vibrant microphones are very calm units as a result of the mix of transformer solitude and healthy, flying transmission lines throughout, along with protected, humbucking coils.
So why not guitars? Guitars are notoriously plagued by noise. Humbucking pickups are merely an incomplete (though important!) solution. Well-known solution is to float your guitar collection to a balanced production, being a microphone. The same idea was printed this 2001 patent application such as David Gilmour Live At Pompeii Dvd?