While we naturally think that we hear with our ears, it is really the brain that converts sound waves into what we perceive as sound. Our most distinctive organ also has a lot of plasticity, being able to adapt its regions to perform tasks normally not assigned to them. Blind people, for example, often have the part of the brain responsible for vision working to more precisely interpret audio and create a better mental picture of what’s around. This principle is what led researchers at Colorado State University to attempt to use the tongue as a medium for passing sound to the brain in deaf people.
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