//The result showed that, as we get older, we get worse at speech processing in general. “The older brain just drops part of the speech signal, even if the ears captured it all just fine,” said co-author Jonathan Simon in a statement. “For older listeners, even when there isn’t any noise, the brain is already having trouble processing the speech
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Also, raising your voice won’t help, because there’s nothing wrong with their ears. It’s the equivalent of shouting the same words over and over at a foreigner, hoping that they’ll start understanding English if it’s loud enough.//
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