These Noise-Canceling Headphones Will Alert You to All the Dangers You Can’t Hear

They’re effective at quelling the sounds of crying babies, but noise-canceling headphones can also tune out sounds you might actually want to hear, like the horn of an approaching car as you absentmindedly step out into a busy street. To make noise-canceling headphones safer, researchers are now teaching them to…

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via Gizmodo

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