Kurt Cobain Stratocaster A guitar pickup is basically just like a dynamic microphone coil. For many years, energetic microphones have already been wired with the voice coil attached to the principal of the microphone's transformer, and not introduced to ground (‘floating'). The microphone's situation is normally attached to the cable shield, which is connected to the mike amplifier's floor (see Rane's web site for more discussion).
By and large, energetic microphones are very quiet products consequently of the combination of transformer isolation and healthy, floating sign lines through the duration of, along with guarded, humbucking coils.
So why don't you instruments? Instruments are notoriously overwhelmed by noise. Humbucking pickups are only an incomplete (though important!) solution. Well-known answer is always to float your guitar pickup to a healthy production, just like a microphone. An identical strategy was published that 2001 patent program like this Kurt Cobain Stratocaster?