Apex Drum Mic Set A best guitar pickup is basically just like an energetic mike coil. For decades, powerful microphones have now been sent with the voice coil attached with the principal of the microphone's transformer, and maybe not called to ground (‘floating'). The microphone's event is usually linked to the cable shield, which will be attached to the microphone amplifier's ground (see Rane's internet site for more discussion).
By and big, active microphones are very quiet devices as a result of the combination of transformer isolation and healthy, suspended sign lines through the duration of, as well as guarded, humbucking coils.
Therefore why not instruments? Guitars are once affected by noise. Humbucking pickups are only an incomplete (though important!) solution. Well-known solution is to float the guitar pickup to a balanced production, being a microphone. The same idea was published this 2001 patent program such as Apex Drum Mic Set?