Acoustic Guitar Martin A electric guitar pickup is basically similar to a dynamic mike coil. For decades, dynamic microphones have now been wired with the style coil attached to the primary of the microphone's transformer, and maybe not recommended to surface (‘floating'). The microphone's situation is typically linked to the wire guard, which will be linked to the mike amplifier's floor (see Rane's site for more discussion).
By and big, active microphones are very quiet devices as a result of the mixture of transformer solitude and balanced, floating transmission lines during, along with protected, humbucking coils.
So why not guitars? Guitars are notoriously plagued by noise. Humbucking pickups are just a partial (though essential!) solution. Well-known answer would be to float your guitar pickup to a healthy output, as being a microphone. The same idea was printed that 2001 patent request such as Acoustic Guitar Martin?