American Audio Powered Speaker A electric guitar pickup is essentially similar to an energetic microphone coil. For many years, dynamic microphones have now been sent with the voice coil mounted on the primary of the microphone's transformer, and perhaps not recommended to floor (‘floating'). The microphone's event is typically linked to the wire guard, which is attached to the mike amplifier's ground (see Rane's web site for more discussion).
By and large, active microphones are very calm units consequently of the mixture of transformer isolation and balanced, hanging indication lines during, in addition to guarded, humbucking coils.
Therefore why not guitars? Instruments are notoriously affected by noise. Humbucking pickups are only a partial (though important!) solution. The most obvious solution would be to float your guitar collection to a healthy productivity, being a microphone. An identical thought was printed that 2001 patent application like this American Audio Powered Speaker?