Last year, there were 148 homicides in Oakland. Today, when someone fires a gun on a city street, a network of hidden microphones kicks in -- triangulating the exact location, and alerting police.
[...] Microphone: An internal microphone array gives the sensor 360-degree coverage and makes it possible to determine the direction a sound came from. GPS Receiver: Global positioning satellites give the location of each sensor... Thermometer: Air temperature determines the speed of sound -- crucial to calculating a shot's location. Network Connection: ...telephone line... (or) digital link... Memory: ...if communication is interrupted... stores sounds until they can be uploaded. [...]
The system knows 11 shots were fired from a car going 9 MPH, northbound, in front of a specific address. [...]
