Best Shure Wireless Mic System A electric guitar pickup is basically just like a dynamic microphone coil. For many years, powerful microphones have now been sent with the voice coil attached with the principal of the microphone's transformer, and maybe not referenced to ground (‘floating'). The microphone's situation is normally connected to the cable shield, which is connected to the microphone amplifier's floor (see Rane's site for more discussion).
By and big, active microphones are extremely calm units as a result of the mix of transformer isolation and balanced, hanging transmission lines throughout, in addition to guarded, humbucking coils.
So you will want to guitars? Instruments are once affected by noise. Humbucking pickups are merely a partial (though essential!) solution. Well-known solution is always to float the guitar pickup to a healthy output, being a microphone. An identical idea was printed that 2001 patent application such as Best Shure Wireless Mic System?