Subtle Differences (IMAGE) Brown University Caption MRI studies showed that test subjects reacted to different sounds -- ta and da, for example -- but appeared to recognize the same sound even when pronounced with slight variations. These five sounds are the same, but the fifth (right) has a slightly different pronunciation. Credit Brown University 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.