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[Ian Meyer <ianmeyer AT gmail.com>]

i forsee civil disobediants coming up with loudspeaker things that
make gunshot like noises or something similar that freak out the
cameras and fight big brother

especially with the directed sound speaker things that are probably
soon to be more readily available, it would be easy to focus a loud
gunshot down a narrow beam at a single monitor, and thus weird out the
system since it cant triangulate the position, or to hit several at
once, with a coordinated interval that maps to a strange location or
something, ya know what I mean?

interesting though

~ian 


On Mon, 1 Nov 2004 17:00:25 -0500 (EST), Alan MacHett
<machett AT ibiblio.org> wrote:
> http://www.technologyreview.com/articles/04/11/prototype71104.asp?p=1
> //
> A new audio surveillance system could help fight crime in the city and
> protect kilometers of unmanned borders. Software developed by Ted Berger,
> director of the University of Southern California Center for Neural
> Engineering, can be trained to recognize and distinguish sounds that are
> indicators of a security breach or a safety hazard, such as a gunshot or
> the rattle of someone climbing a chain-link fence. The software is based
> on mathematical models that mimic the way the brain interprets sound, but
> it can distinguish between two similar sounds far more precisely than the
> human ear. This fall, Oak Brook, IL-based Safety Dynamics plans to
> implement the software in surveillance devices that monitor urban
> activity. Mounted on streetlight poles, the devices will listen for
> gunshots, then guide surveillance cameras toward the source of the sounds.
> Berger says the technology can also be used for large-scale security; an
> array of detectors placed along a deserted border, for example, could
> listen for footfalls or whispers, painting a scene solely on the basis of
> acoustic information. The detectors could then notify a central location
> of any suspicious activity.
> //
> 
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