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A gunfire locator or gunshot detection system is a system that detects and conveys the location of gunfire or other weapon fire using acoustic, optical, or potentially other types of sensors, as well as a combination of such sensors. These systems are used by law enforcement, security, military and businesses to identify the source and, in some cases, the direction of gunfire and/or the type of weapon fired. Most systems possess three main components:
An array of microphones or sensors either co-located or geographically dispersed
A processing unit
A user-interface that displays gunfire alerts.
Systems used in urban settings integrate a geographic information system so the display includes a map and address location of each incident.