Tuesday, December 9, 2008

Seismic Siren Shakes Up Distracted Drivers

Police across the country are using a new tool to get your attention - low-frequency sound waves so strong they can be felt up to 200 feet away. <A target="_blank" href="http://www.wired.com/gadgets/miscellaneous/magazine/16-12/st_subsiren">Federal Signal makes the seismic sirens</A>, dubbed the Rumbler. The system emits a 10-second, 109-decibel burst through two subwoofers mounted on a patrol car's bumper.

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