Apple Wired Keyboard Extension Cable A best guitar pickup is basically just like a vibrant microphone coil. For decades, active microphones have now been sent with the voice coil attached to the principal of the microphone's transformer, and maybe not recommended to soil (‘floating'). The microphone's event is usually linked to the cable shield, which is connected to the microphone amplifier's ground (see Rane's site for more discussion).
By and big, active microphones are extremely calm devices as a result of the mix of transformer solitude and balanced, hanging indication lines throughout, as well as guarded, humbucking coils.
So why not guitars? Instruments are notoriously affected by noise. Humbucking pickups are just an incomplete (though crucial!) solution. The obvious alternative is always to float practicing the guitar collection to a healthy result, just like a microphone. A similar thought was printed that 2001 patent application such as Apple Wired Keyboard Extension Cable?