Justin Hayward Youtube A electric guitar collection is essentially similar to a dynamic microphone coil. For many years, energetic microphones have already been sent with the voice coil attached with the primary of the microphone's transformer, and not introduced to soil (‘floating'). The microphone's case is typically attached to the wire guard, that is linked to the microphone amplifier's ground (see Rane's website for more discussion).
By and big, active microphones are extremely calm devices as a result of the mix of transformer solitude and healthy, suspended sign lines during, in addition to guarded, humbucking coils.
Therefore why not instruments? Guitars are notoriously plagued by noise. Humbucking pickups are only a partial (though crucial!) solution. Well-known option would be to float practicing the guitar pickup to a balanced result, being a microphone. A similar idea was published this 2001 patent program such as Justin Hayward Youtube?