We've updated our guide Street-level Surveillance technology to include Acoustic Gunshot Detection. ShotSpotter is currently being used in over 100 cities across the world. Learn more about the technology here:
The new gunshot detection system is a kind of network of acoustic sensors that detect the sound of a gunshot “precisely” and then quickly figures out the location of the gunfire. In less than a minute, ShotSpotter tells 911 dispatchers of the incidents.