A String On Double Bass A electric guitar collection is basically just like a powerful mike coil. For decades, powerful microphones have been sent with the voice coil mounted on the principal of the microphone's transformer, and perhaps not referenced to soil (‘floating'). The microphone's case is typically attached to the wire shield, that is attached to the mike amplifier's floor (see Rane's internet site for more discussion).
By and big, active microphones are very quiet units as a result of the mixture of transformer isolation and balanced, floating indication lines during, along with guarded, humbucking coils.
So why don't you guitars? Instruments are once affected by noise. Humbucking pickups are only a partial (though important!) solution. Well-known alternative is to move the guitar pickup to a healthy production, being a microphone. A similar idea was printed this 2001 patent program such as A String On Double Bass?