How loud are firearms in DD& 5e, and can Artificers modify or build firearms to reduces the noise they make?

How far can you hear a gunshot, and what would be the standard DC for Perception (Wisdom) to detect it?

I understand you can cast [Silence][1] on the firearm, but I'd want to know if it is possible to reduce the noise or induce disadvantage on Perception (Wisdom) checks to detect it by mechanical means.

Example   

 1. You can hear gunshot noise up to X feet away at a DC of Y.
 2. The Artificer modifies it or builds a new firearm with noise reduction.
 3. You can hear the modded gunshot now up to X-Z feet away at a DC of Y-Z.

  [1]: https://www.dndbeyond.com/spells/silence