One way to cut down on the noise - legalize sound suppressors. Even many of the euro-weenie governments "allow" (in their infinite "wisdom") this.
Don’t know what they do today but you used to be able to have them with a FFL and permit.
An uncle had a Vietnam-era (?) pistol they called a “hush puppy” that was factory suppressed. That was a POS though. It’d made a better cudgel than a pistol, the way I remember it.
Some family friend had a suppressed .30 cal rifle of some sort. All I remember about it is that the suppressor was at least three feet long so the entire rig was more like seven feet. The other thing was that it fired some sort of wacky hand-loads (so it was subsonic, I guess) and wouldn’t eject the shells right… always jammed up some way or other.