New Smartphone App (IMAGE) University of Washington Caption UW researchers have created a new smartphone app that can detect fluid behind the eardrum by simply using a piece of paper and a smartphone's microphone and speaker. Credit Dennis Wise/University of Washington Usage Restrictions For reuse with appropriate 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.