Creating a Phantom River (IMAGE) California Polytechnic State University Caption Dr. Dylan Gomes led the team that deployed speaker arrays early in the spring to begin playback of whitewater river noise before most birds and bats were using this high elevation (5000-7000') mountain area. Credit Dr. Cory Toth Usage Restrictions Image may only be used with appropriate caption and credit. 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.