Ultrasonic Levitation

Scientists can float objects in mid-air, using just the power of sound. Now, using ultrasonic speakers, they can levitate things with more control than ever before, moving small objects in three dimensions even with the whole array turned upside down. They have also developed virtual ‘holograms’ to visualise how the shapes made by the sound waves can ‘grab’ objects.

Find the full paper here: http://nature.com/articles/doi:10.1038/ncomms9661