Comment Comment by brk How comes already there are no firearm firing sound detectorsThere are: http://www.shotspotter.com/Though results are mixed at best: https://www.cctvcambridge.org/DoesShotSpotterWork parent brk 10 years ago
There are: http://www.shotspotter.com/
Though results are mixed at best: https://www.cctvcambridge.org/DoesShotSpotterWork