Silicon nitride membrane (IMAGE) University of Copenhagen Caption A thin silicon nitride membrane (white) is stretched tight across a silicon frame (red). The membrane contains a pattern of holes, with one small island in the center, whose vibrations are measured in the experiment. Credit Ola Joensen 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.