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By and big, powerful microphones are very quiet units as a result of the mix of transformer solitude and healthy, flying indication lines all through, along with shielded, humbucking coils.
So why don't you instruments? Guitars are notoriously affected by noise. Humbucking pickups are only an incomplete (though essential!) solution. The obvious answer would be to float practicing the guitar collection to a healthy result, being a microphone. A similar strategy was published this 2001 patent application like this Best Guitar Solos Rolling Stone?