How To Build Your Own Guitar A electric guitar pickup is actually much like an energetic mike coil. For many years, active microphones have been wired with the style coil attached with the principal of the microphone's transformer, and maybe not referenced to floor (‘floating'). The microphone's event is typically linked to the wire shield, which is linked to the mike amplifier's ground (see Rane's site for more discussion).
By and large, energetic microphones are extremely calm devices consequently of the mixture of transformer isolation and healthy, flying indication lines throughout, as well as protected, humbucking coils.
Therefore why not instruments? Instruments are notoriously plagued by noise. Humbucking pickups are merely a partial (though essential!) solution. The most obvious answer is always to float your guitar pickup to a healthy productivity, as being a microphone. The same idea was published this 2001 patent program like this How To Build Your Own Guitar?