Audio sensors set up throughout Atlantic City are helping police know where gunshots are fired — even when no one calls 911.
The ShotSpotter audio-detection system is activated whenever a boom or bang goes off in the city. Three or more sensors triangulate on the sound, which goes to a national operations center. Specialists trained in acoustics and gunfire analyze the information, and it's passed on to the municipality's dispatch — if the sound is determined to be a gunshot and not something else, such as fireworks.
The process, according to the company, takes about 30 to 40 seconds.
The city will not say where the sensors are as a precaution against possible attempts at tampering with them. They are made to blend in with their surroundings.
The system records how many shots were fired, time and location, and guarantees an 80 percent success rate, although police say it has been much higher. The aim is to eventually integrate the system with existing cameras to give police audio and video information.