![]() ![]() The researchers were able to use the correspondence to predict where the eyes were going to look, after averaging out the ambient noise. Now, they have shown that the sounds consist of horizontal and vertical components that precisely correspond to how the eyes move. Previous work from the research group had shown that these sounds exist. They then recorded minute sounds in the eardrum while prompting the research subject to follow visual cues with their eyes. To figure out how the brain coordinates the two systems, Groh and her co-authors placed small microphones in the ear canal. But unless you move your head, that timing difference is not going to change,” says senior author Jennifer Groh, a psychology and neuroscience professor at Duke University. “Every time we move our eyes, we’re yanking that camera to look in a new direction. But the alignment of the auditory and visual scene is constantly changing. Our ears can tell where a sound is coming from based on the timing of its arrival at the left and right ears. They report their results in the Proceedings of the National Academy of Science. Now, the researchers have eavesdropped on that signal to better understand how the brain connects what it sees with what it hears. ![]() That connection allows the auditory system to “listen” to the eyes, according to researchers at Duke University. Every time our eyes move, so do our eardrums. ![]()
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