Researchers (IMAGE) Stanford University Caption This is Amin Arbabian, assistant professor of electrical engineering (right), and graduate student Angad Rekhi (left) with their ultrasonic wake-up receiver and the circuit boards used to test its performance. Credit Arbabian Lab/Stanford University Usage Restrictions Image may only be used with appropriate caption or 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.