The quick response - within seconds - came because a nearby sensor picked up the sound of the muzzle blast, pinpointed the shooter's location to within 10 feet and alerted police dispatchers of the address...The ShotSpotter system is only triggered by gunfire and it can discern the type of weapon (rifle, shotgun or handgun) being used. The software in the sensors also commands the surveillance cameras to rotate and focus on the spot where the shot was fired.
Shades of "The Black Arrow."
I wonder what would happen of someone played some of these through loudspeakers...
[Via KABA Newslinks]