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Re: domestic audio surveillance in LA, Redwood City
At 12:25 PM 1/4/00 -0800, Blank Frank wrote:
>Audio sensors installed
> Last month, the sheriff's department
> installed several audio sensors on
> rooftops and utility poles in a
> 1-square-mile area of the
> Willowbrook neighborhood in the
> south-central area of the county, near
> Long Beach.
> The sensors are part of the ShotSpotter system, which was
> invented by the Northern California-based Trilon Technology
> company. The sensors are designed to detect loud noises
> such as gunshots, firecrackers and car backfires. A computer
> analyzes data from the sensors and uses a method known as
> triangulation to immediately pinpoint the location of a noise
> within 30 feet. Police dispatchers can then see the locations of
> loud noises on their computer screens.
> So far, the ShotSpotter has only been adopted by Redwood
> City, just south of San Francisco. The Los Angeles County
> Sheriff's Department is testing the device for 30 days and may
> choose to buy it later for $185,000, said spokesman Deputy
> Bob Killeen.
In the 1994 pilot development of a prototype for such a system was proposed
by members of the Wireless Communication Alliance a member of the then
Joint Venture Silicon Valley government-industry alliance, for the City of
East Palo Alto. Don't know if anything every became of this activity.