First Sounds First (IMAGE) University of Oregon Caption University of Oregon neuroscientists Terry Takahashi, left, and Brian Nelson, studying hearing in barn owls, have determined that the processing of sounds, such as a person's voice, is basically simple: We hear the direct sound and "ignore" the echoes. Credit Photo by Jim Barlow 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.