>>>If spotting a cop in your rearview mirror tends to make you tremble now, just wait. Fed up with earbud-wearing, cell phone-yakking motorists who don't heed sirens, police across the country are turning to a new attention-getting tool--low-frequency sound waves so strong they can actually be felt up to 200 feet away. "It feels like a tremor inside the vehicle," says Tom Morgan, police market vice president for Federal Signal, which makes the seismic sirens.
Dubbed the Rumbler, the system emits a 10-second, 109-decibel burst through two subwoofers mounted on the patrol car's bumper. The idea is that when a cruiser pulls up behind a distracted driver, the hit of bone-rattling whomp will get the space-case to glance up from text-messaging long enough to realize there's an official vehicle bearing down.

So far, more than 200 police and sheriff departments nationwide have bought thousands of the $400 setups, and a hundred more are trying them out. What if the sonic booms don't work? Well, the cops could always try adding some hydraulics to bounce the front end up and down to the beat.<<<



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