Withings Aura gives us the atmospheric vibe that it’ll be the best sleep tracking device of 2014 because it’s designed to monitor rest and, believe it or not, actively increase the amount of sleep you get throughout the night.That’s better than the handful of sleep tracking gadgets out there right now, from the accurate Jawbone Up bracelet to the less-competent-at-sleep Fitbit Force activity band. The Sleep Cycle alarm clock, a simple iOS app for iPhone, does all of this for a fraction of the price too. But none of these devices nor apps go beyond basic minute-by-minute metrics and scores.Withings Aura takes sleep tracking to the next REM stage with a two-part system that we tested during our non-stop CES 2014 coverage. Off our feet and onto the demo bed, we found a soft sleep sensor tucked underneath the mattress and an odd-shaped, light emitting alarm clock at our bedside.The white-cloth sensor was physically flat, but the sleep patterns it detected came to life thanks to real-time data on a dedicated app. It told us about our body movement, breathing cycles and heart rate, even though it was buried 3 inches beneath a mattress.Light-emitting alarm clockThe more interesting component is what Withings calls the “bedside device,” a light-emitting alarm clock that looks more like a ship’s horn-shaped vent.Glowing from this vent-like opening is multi-colored LED dimming lighting technology, which the company says is “scientifically-validated light.” It glows a red or orange melatonin-inducing wavelength at night and transitions to a peaceful blue color to do the opposite by morning.Soothing sounds also play a part in the bedside device’s attempt to mimic the body’s circadian rhythm. There are relaxing frequencies at night for falling asleep and stimulating […]