Normalized Total Displacement (IMAGE) Science China Press Caption These are snapshots of the normalized total displacement ( ) of plane elastic waves at 120 kHz pass through voids: (a) Without cloak; (b) with the cloak based on the traditional equations; (c) with the cloak based on the new equations. Credit ©Science China Press 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.