I'd thought about working on this myself after hearing about "ShotSpotter" on the YouTube channel "Live on Patrol". That company apparently charges quite a bit for those and it seemed to me that using an RPi would be a lot less expensive, so it's great to see you've actually done the work on this.

I live a rural area surrounded by public land and lots of hunters so hearing gunshots is common because there's almost always some kind of game in season, and fireworks are common as well because those are legal all year long here as well.

I found this awhile back: https://www.best-microcontroller-projects.com/sound-origin-d..., but I've not tried to set it up.

I have a few old RPi boards so I'll see if I can get this up and running.