What Acoustic Guitar Should I Buy A best guitar collection is basically much like an energetic mike coil. For many years, dynamic microphones have been sent with the voice coil attached to the principal of the microphone's transformer, and maybe not recommended to surface (‘floating'). The microphone's event is normally linked to the wire guard, which can be attached to the mike amplifier's surface (see Rane's web site for more discussion).
By and large, energetic microphones are extremely calm devices as a result of the combination of transformer isolation and balanced, flying sign lines throughout, along with guarded, humbucking coils.
So why not guitars? Instruments are notoriously affected by noise. Humbucking pickups are just a partial (though crucial!) solution. The most obvious alternative is to float the guitar pickup to a balanced output, being a microphone. The same strategy was published this 2001 patent application like this What Acoustic Guitar Should I Buy?