Unit cell (image) ETH Zurich Department of Physics Share Print E-Mail Caption Unit cell of the acoustic crystal. The width is 40 mm, and the total height 32 mm. Credit ETH Zurich/D-?PHYS Huber group Usage Restrictions None Share Print E-Mail 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.