Martin D15 Mahogany A electric guitar collection is basically just like a vibrant mike coil. For decades, energetic microphones have now been wired with the style coil attached to the primary of the microphone's transformer, and perhaps not recommended to floor (‘floating'). The microphone's event is typically attached to the wire shield, that is attached to the mike amplifier's soil (see Rane's site for more discussion).
By and big, powerful microphones are very quiet units as a result of the mix of transformer solitude and balanced, flying sign lines for the duration of, along with protected, humbucking coils.
So why not instruments? Guitars are notoriously overwhelmed by noise. Humbucking pickups are only an incomplete (though crucial!) solution. Well-known answer is to float the guitar pickup to a balanced output, just like a microphone. The same idea was printed this 2001 patent software such as Martin D15 Mahogany?