16.07.2013 16:50 Uhr, Quelle: Engadget

Scientists use sound waves to lift and move objects, make cup of joe in mid air

​ Levitating objects with sound waves isn't anything new, but a team from Switzerland has taken it to the next level by rotating and moving objects as they float. In fact, the researchers were able to manipulate a number of objects mid-air, including water droplets, inserting DNA into cells and mixing up a little instant coffee. If you're wondering how intense sound waves need to be to get things moving (at this level, at least) then 160 decibels is the starting point. If that sounds ear-splittingly loud, that's because it is. But, by using frequencies typically out of the human audible range (24 kHz), no ears were at risk. T

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