Science Backs Statement: 'You Sound Tired'
Researchers Say Change in Voice Indicates Level of Fatigue
By LARA SALAHI and MARK ABDELMALEK
March 3, 2011
You might think a cup of coffee or a quick walk before heading to your job will cover up your exhaustion from long working hours and little sleep.
Although it's a common phrase used to describe someone who might sound lethargic, many researchers say a closer look into how someone sounds can reveal how dangerous a sleep-deprived person might be.
Researchers at a Pennsylvania State University psychology lab are going beyond what the human ear can detect to measure how changes in speech could detect sleepiness. They found everything from voice inflection to letter pronunciation can indicate how tired you are and whether you may be better off sitting out of work than trying to stay productive.
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