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I was hoping it was about some tech to triangulate coordinates of illegal fireworks or gunfire. My wife has PTSD and our neighborhood has become almost unlivable because of illegal commercial grade fireworks year round.

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If shotspotter[1] is anything to go by, doing this sort of stuff accurately is non trivial.

[1] https://en.wikipedia.org/wiki/ShotSpotter#Accuracy

That's not a problem here, though. You're not after recognition accuracy, like, telling apart gunshots, fireworks and car engine backfires. You're after accurate positioning and timestamping of any noise source above some loudness threshold. That should be much, much simpler.

Is there any tech that reliably tell the difference between fireworks and gunfire?

I live in a neighborhood where the question has come up a few times.

Supersonic rounds make a distinctive noise that machines could reliably distinguish from fireworks (humans can learn to do this too). But distinguishing arbitrary subsonic ammo vs. arbitrary fireworks seems like it would be at least an order of magnitude harder & I don't think it could be made 100% reliable

By ear, fireworks is regular in a way that gunfire is not.

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