Brad Paisley Guitar A best guitar collection is basically just like a dynamic mike coil. For many years, powerful microphones have been sent with the style coil attached with the principal of the microphone's transformer, and maybe not called to floor (‘floating'). The microphone's case is typically connected to the wire guard, which is attached to the microphone amplifier's ground (see Rane's site for more discussion).
By and big, powerful microphones are extremely calm devices as a result of the mix of transformer isolation and healthy, flying sign lines for the duration of, in addition to guarded, humbucking coils.
So why don't you instruments? Guitars are notoriously plagued by noise. Humbucking pickups are only an incomplete (though important!) solution. The most obvious answer would be to move practicing the guitar pickup to a balanced result, just like a microphone. A similar idea was printed that 2001 patent application such as Brad Paisley Guitar?