CELLPHONES could sound the alarm in the event of a disaster and pass on the alert from phone to phone – even if most of a cellphone network is down. So says Motorola in a new patent application.
In an emergency, such as a hurricane or terrorist attack, the US government can operate the Emergency Alert System (EAS), which harnesses all TV and radio frequencies, to broadcast warning messages to people in their homes. “Unfortunately, a large portion of the intended recipients will not have their TV and radio systems turned on when a disaster occurs,” says Motorola engineer Jerome Vogedes…
