Avid Audio Interface A electric guitar collection is basically similar to a vibrant mike coil. For many years, active microphones have now been sent with the voice coil attached to the principal of the microphone's transformer, and maybe not called to ground (‘floating'). The microphone's case is typically attached to the wire guard, which will be linked to the mike amplifier's ground (see Rane's web site for more discussion).
By and large, dynamic microphones are very quiet units consequently of the mixture of transformer isolation and healthy, flying indication lines for the duration of, as well as shielded, humbucking coils.
Therefore why not instruments? Instruments are notoriously plagued by noise. Humbucking pickups are merely an incomplete (though important!) solution. The obvious answer would be to float your guitar pickup to a balanced result, being a microphone. A similar idea was printed this 2001 patent program such as Avid Audio Interface?