Rickenbacker Lap Steel A best guitar collection is basically similar to an energetic mike coil. For many years, dynamic microphones have now been sent with the style coil mounted on the principal of the microphone's transformer, and not called to surface (‘floating'). The microphone's case is normally linked to the cable shield, which is connected to the mike amplifier's surface (see Rane's site for more discussion).
By and big, active microphones are very quiet products as a result of the combination of transformer isolation and balanced, flying indication lines during, along with guarded, humbucking coils.
So why not guitars? Instruments are once affected by noise. Humbucking pickups are only an incomplete (though important!) solution. Well-known solution would be to float practicing the guitar pickup to a healthy output, being a microphone. An identical thought was printed that 2001 patent application such as Rickenbacker Lap Steel?