Gunshot detectors
How gunshot-detecting microphones help police curb crime
WASHINGTON, DC
IF A gun fires and nobody reports it, does it make a sound? Some police forces are finding out. On September 3rd the Urban Institute, a think-tank, produced a report based on data from Washington DC's police "ShotSpotter" system, a network of microphones that covers around a quarter of the city. In the 2011-12 school year, the devices detected 336 incidents of gunfire during the school day. Over half the schools in the covered area had at least one gunshot nearby—most of which went unreported.
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