Acoustic Bottle (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption After being emitted from a planar-phased source, sound energy forms a 3D acoustic bottle of high-pressure walls and a null region in the middle. Pressure field at bottom shows self-bending ability of the bottle beam to circumvent 3D obstacles. Dashed arrows indicate wave front direction. Credit Courtesy of Xiang Zhang group 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.