美国科学60秒 SSS 2013-06-21（在线收听）

 　　Are you listening to this part cares when you drive, then texting your friends about it? Don’t you do that, the texting, I mean. Because a new study shows even a few use of hand free device, sending or receiving a electronic message can prove a major distraction. That’s agreeing to research sponsored by the triplicate foundation for traffic safety. More and more car makers are equipping their viocals with schedules that allow you interact with electronics, from checking your GPS or updating your face book pages. Many of these features are increasingly voice-activated, so you can keep your eyes on the road and your pause attended too. But hands free isn't risk free. Researcher has measured drivers' brain activity, as they engaged in common tests where behind the wheel, like listening to a audio book, talking on a phone or responding to a voiced activated E-mail system. and they found that calling was a challenge, but their corresponding required serious metal band with, even without use fingers. Voice recognition taxing slow drive reaction times and made them missing things right front of them. And that kind of miss, can lead to a hit.