US Patent 9007219 Sleep-disrupting apparatus for a vehicle

A sleep disrupting apparatus disposed in a vehicle includes a processor and at least one vibration generator. The vibration generator is connected to the processor and is located in the vehicle in a position proximate to a passenger such that vibrations generated by the vibration generator are transmitted to the passenger. The processor determines a time index, generates at least three vibration signals consistent with the time index, and transmits the three vibration signals to the at least one vibration generator. The three vibration signals are separated from one another by two time intervals. The two time intervals are not equal to one another.