Blues Scales Guitar A electric guitar collection is actually similar to a powerful mike coil. For decades, vibrant microphones have already been wired with the style coil mounted on the primary of the microphone's transformer, and not called to floor (‘floating'). The microphone's case is typically attached to the cable guard, that is connected to the mike amplifier's ground (see Rane's website for more discussion).
By and large, dynamic microphones are extremely calm devices consequently of the combination of transformer isolation and balanced, suspended sign lines throughout, along with guarded, humbucking coils.
So why not instruments? Instruments are once affected by noise. Humbucking pickups are merely an incomplete (though important!) solution. Well-known answer is to float your guitar pickup to a balanced output, being a microphone. The same strategy was published this 2001 patent request such as Blues Scales Guitar?