ShotSpotter microphones detect gunshots and triangulate location . Technology uses filtering process to eliminate car door slams and yelling . Snippet of a sound was used to get New York City murder conviction . Company says no private conversations are being monitored by its system . Massachusetts is beginning pilot program for $ 1.5million .
ShotSpotter microphones detect gunshots and triangulate location . Technology uses filtering process to eliminate car door slams and yelling . Snippet of a sound was used to get Massachusetts murder conviction . Company says no private conversations are being monitored by its system . New York City is beginning pilot program for $ 1.5million .