Zhenhua Tian (IMAGE) Virginia Tech Caption (From left) Assistant Professor Zhenhua Tian and student Teng Li with an emitter used to create an acoustic vortex. Credit Photo by Alex Parrish for Virginia Tech. Usage Restrictions None License Original 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.