Metamaterial Cells (IMAGE) Duke University Caption This image shows a computer rendering if the 12 different kinds of spirals contained in the metamaterial blocks, each of which slows sound waves by a specific amount. Organizing the various spirals in an array can bend the shape of in incoming wave of sound. Credit Steve Cummer, Duke University Usage Restrictions None 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.