Virtual Pillar Formation (VIDEO) Duke University This video is under embargo. Please login to access this video. Caption Watch as a single sound wave creates a series of “virtual pillars” down the middle of a fluid-filled channel. Credit Jinxin Zhang, Duke University 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.