The ShotSpotter Gunshot Location System
Technology Overview
The ShotSpotter Gunshot Location System utilizes patented technology to detect gunfire and explosive discharges over wide areas and diverse operating environments. ShotSpotter uses either wired or wireless sensors deployed over areas from one square mile up to tens of square miles or hundreds of linear miles. For example, 90 miles of Interstate were covered in central Ohio during the Columbus, OH sniper investigation. The technology can also be used for urban neighborhoods, critical infrastructure, seaports and distribution gateways, stadiums, airports, campuses, and military combat zones.
ShotSpotter utilizes the principle of acoustic triangulation to locate gunfire across wide areas. Because of its patented spatial filter technology, ShotSpotter systems are not fooled by noises that sound like gunfire but are misleading (like car backfires, firecrackers, etc.). Similarly, the technology filters out echoes and other acoustical anomalies. Using a continuous feedback loop which constantly adjusts sensor trigger and other parameters, ShotSpotter is able to deliver instantaneous system reports to dispatchers within seconds of a weapon being fired.
The unique spatial filter technology makes for a very cost-effective solution: ShotSpotter systems deploy with an average of 20 sensors per square mile—far fewer than the number required by any other systems. ShotSpotter sensors detect gunfire at a range of one to two miles away from the sensors, and ShotSpotter systems have been shown to be accurate to within 25 meters over one to two mile ranges.
In addition, ShotSpotter performs real-time spooling of all signals captured at a sensor, to support later detailed forensic and intelligence analysis of events. Such information can include other non-weapons events, weapon type and direction of fire analysis, and even information related to the direction and speed of shooters on the move.
Forensic evidence from a drive-by shooting
11 shots fired by two gunmen in vehicle moving NNW @ 9mph
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