VIDEO | by WSJLive

Smart Alarms That Wake You Gently

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VIDEO DESCRIPTION:
Does being jarred awake out of a deep sleep make you grumpy and groggy? A bevy of new devices measure your sleep cycles and ...
wake you up when you are sleeping lightly. Leslie Yazel has details on Lunch Break. Photo: aXbo.
Posted: 04/24/2012 | Views: 1,149 | Duration: 03:39
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