Most people don't understand that sound waves do much more than
produce the noises we hear on a daily basis but the pressure differential that
cause sound can now be used to manipulate cells. Engineers from MIT, Penn
State University and Carregie Mellon University have created a way of maneuvering
cells in three dimensions using the newly developed acoustic tweeters. Check out the article in the below link.
http://ein.iconnect007.com/index.php/article/95376/acoustic-tweezers-manipulate-cells-with-sound-waves/95379/?skin=ein