Got that ringing in your ears? Tinnitus, the debilitating condition that plagued Beethoven and Darwin, affects roughly 10 per cent of the world's population, including 30 million people in the US alone. Now, a device based on vagus nerve stimulation promises to eliminate the sounds for good by retraining the brain. At the moment, many chronic sufferers turn to state of the art hearing aids configured to play specific tones meant to cancel out the tinnitus. But these do not always work because they just mask the noise.
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