Smartphone used by CovertBand (image) University of Washington Share Print E-Mail Caption The researchers tested CovertBand using a Samsung Galaxy S4 smartphone hooked up to a portable speaker. Credit Dennis Wise/University of Washington Usage Restrictions Must include credit. Share Print E-Mail 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.