Audio Technica Lp120 A electric guitar pickup is essentially much like an energetic 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 perhaps not recommended to ground (‘floating'). The microphone's situation is usually attached to the cable shield, that will be linked to the mike amplifier's ground (see Rane's web site for more discussion).
By and large, vibrant microphones are very calm units as a result of the mix of transformer isolation and healthy, flying indication lines through the duration of, as well as shielded, humbucking coils.
Therefore why not instruments? Instruments are notoriously affected by noise. Humbucking pickups are only a partial (though essential!) solution. The most obvious solution would be to move the guitar pickup to a healthy output, just like a microphone. A similar strategy was published this 2001 patent software such as Audio Technica Lp120?