Shure Sm 35 A best guitar pickup is basically just like a vibrant mike coil. For decades, powerful microphones have been sent with the voice coil attached with the primary of the microphone's transformer, and not introduced to floor (‘floating'). The microphone's case is usually connected to the wire guard, which is linked to the microphone amplifier's soil (see Rane's web site for more discussion).
By and large, powerful microphones are very quiet devices consequently of the mix of transformer isolation and healthy, floating transmission lines for the duration of, along with shielded, humbucking coils.
So why don't you instruments? Instruments are once plagued by noise. Humbucking pickups are just an incomplete (though crucial!) solution. Well-known option would be to float the guitar pickup to a balanced production, just like a microphone. A similar thought was published that 2001 patent request like this Shure Sm 35?