Photo of Acoustic Tweezer (IMAGE) Penn State Caption This is a photograph of an acoustic tweezer device about twice the size of a penny. Two sound transducers move the cells out of the stream for separation. Credit Tony Jun Huang, Penn State Usage Restrictions Non commercial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.