Are you a real grump (发脾的人) in the morning? Do you wake up every day feeling tired, angry and upset, and all too ready to hit the snooze button? If so, then a new alarm clock could be just for you.
The clock, called SleepSmart, measures your sleep cycle, and waits for you to be in your lightest phase of sleep before rousing you. Its makers say that should ensure you wake up feeling refreshed every morning.
As you sleep you pass through a sequence of sleep states—light sleep, deep sleep and REM sleep—that repeats approximately every 90 minutes. The points in that cycle at which you wake can affect how you feel later, and may even have a greater impact than how long or little you have slept. Being roused during a light phase means you are more likely to wake up cheerful and full of life and interest.
SleepSmart records the distinct pattern of brain waves produced during each phase of sleep, via a headband equipped with electrodes and a microprocessor. This measures electric activity of the wearer"s brain, and communicates wirelessly with a clock unit near the bed. You program the clock with the latest time at which you want to be wakened, and it then wakes you during the last light sleep phase before that.
The concept was invented by a group of students at Brown University in Rhode Island after a friend complained of waking up tired and performing poorly on a test. "As sleep-deprived people ourselves, we started thinking of what to do about it," says Eric Shashoua, a recent college graduate and now chief executive officer of Axon Sleep Research Laboratories, a company created by the students to develop their ideas. With help from entrepreneurial grants and alumni investors, they have almost finished a prototype and plan to market the product by next year.