Robotic Sonar Head (IMAGE) Virginia Tech Caption This robotic sonar head mimics the emission and reception dynamics of the horseshoe bat, which uses small movements of the ears and noseleaf to encode extra information in sonar pulses. Credit Logan Wallace/Virginia Tech 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.