Next time you’re in a car accident — or get knocked down
violently in a barroom brawl — your cellphone or
PDA might be able to automatically call 911 for you. A Texas
Instruments patent application envisions a personal alarm with an accelerometer that can be built into portable
devices. The unit would be able to create an acceleration profile and determine whether it has sustained a violent
incident or has just been dropped (of course, depending on how much you’ve paid for your phone or
PDA, that might
constitute a violent incident). Coupled with GPS, the alarm could send an automated message to emergency officials,
alerting them to your location.
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http://cellphones.engadget.com/entry/1234000697061921/