Buzzing String On Acoustic Guitar A guitar pickup is basically just like a powerful mike coil. For decades, dynamic microphones have now been sent with the voice coil mounted on the primary of the microphone's transformer, and perhaps not referenced to ground (‘floating'). The microphone's event is normally linked to the cable guard, that is connected to the mike amplifier's soil (see Rane's site for more discussion).
By and large, active microphones are extremely calm products as a result of the mixture of transformer solitude and healthy, floating sign lines throughout, along with protected, humbucking coils.
So why don't you guitars? Instruments are notoriously plagued by noise. Humbucking pickups are only an incomplete (though crucial!) solution. The obvious option is always to float practicing the guitar collection to a balanced result, being a microphone. A similar idea was published this 2001 patent program like this Buzzing String On Acoustic Guitar?