Sound Spotlight (image) University of Sussex Share Print E-Mail Caption The set-up for Dr Gianluca Memoli's metasurface speaker. Credit University of Sussex. Usage Restrictions To be used only in conjunction with story about University of Sussex research. 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.