You may have been hearing about recent research from Johns Hopkins which shows a strong connection to hearing loss and dementia. If you'd like to read more about it here are a couple of links:
http://www.hopkinsmedicine.org/news/media/releases/hearing_loss_and_dementia_linked_in_study
http://www.usatoday.com/story/news/nation/2013/01/21/dementia-hearing-loss-elderly/1842919/
Here is a link to the actual study:
http://archneur.jamanetwork.com/article.aspx?articleid=802291
http://www.hopkinsmedicine.org/news/media/releases/hearing_loss_and_dementia_linked_in_study
http://www.usatoday.com/story/news/nation/2013/01/21/dementia-hearing-loss-elderly/1842919/
Here is a link to the actual study:
http://archneur.jamanetwork.com/article.aspx?articleid=802291