Cambridge Police report officers will fire guns between 8 and 9:30 p.m. in Area 4 and Inman Square to test the city's new system for detecting gunfire.
The city is installing a ShotSpotter Flex system, which uses sensitive sensors and software to help police "hear" gunfire. The tests are to help calibrate the sensors. Boston has had a similar system in place in high-crime areas for several years now.
The tests will consist of a sequence of gunshot sounds followed by validation of quality detection by ShotSpotter. During the tests, a bullet trap will be used to ensure public safety. No bullets will be fired into the air. There is no danger to anyone in the testing areas, which will be held in cordoned-off areas away from the public.