smartphone hearing screening ear probe (IMAGE) University of Washington Caption A team led by researchers at the University of Washington has created a new hearing screening system that uses a smartphone and earbuds. One reason the commercial device is expensive is that its speaker has been designed to play the two tones without any interference. The UW researchers found that they could use affordable earbuds — where each earbud plays one of the two tones — instead. The earbuds are connected to a microphone in a probe (shown here in blue) that can be placed in the patient's ear. Credit Raymond Smith/University of Washington Usage Restrictions For use with appropriate credit License Original 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.