Tap To Play A electric guitar collection is basically much like a powerful mike coil. For many years, powerful microphones have already been sent with the style coil mounted on the principal of the microphone's transformer, and maybe not referenced to ground (‘floating'). The microphone's case is usually linked to the cable shield, that will be attached to the microphone amplifier's surface (see Rane's site for more discussion).
By and big, vibrant microphones are very quiet devices as a result of the mixture of transformer solitude and healthy, flying transmission lines throughout, along with protected, humbucking coils.
So why don't you guitars? Instruments are notoriously affected by noise. Humbucking pickups are merely a partial (though important!) solution. The most obvious solution would be to move your guitar collection to a healthy productivity, just like a microphone. A similar thought was printed this 2001 patent request such as Tap To Play?