Acoustic waves in a crystal (IMAGE) Technical University of Denmark Caption A unique X-ray technique allowed scientists to film soundwaves’ propagation in a diamond crystal. Credit Credit: Theodor S. Holstad et al./DTU. Usage Restrictions None, but please credit: Theodor S. Holstad et al./DTU. 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.