Frank Zappa Greatest Hit A electric guitar collection is essentially much like an energetic mike coil. For many years, dynamic microphones have now been wired with the voice coil attached to the principal of the microphone's transformer, and maybe not called to ground (‘floating'). The microphone's situation is typically connected to the wire guard, that is attached to the microphone amplifier's soil (see Rane's internet site for more discussion).
By and large, powerful microphones are very calm units consequently of the mixture of transformer isolation and balanced, suspended transmission lines throughout, as well as guarded, humbucking coils.
Therefore why not instruments? Instruments are once plagued by noise. Humbucking pickups are only an incomplete (though important!) solution. The obvious option would be to move the guitar pickup to a balanced result, as being a microphone. The same idea was published this 2001 patent application such as Frank Zappa Greatest Hit?