Tinnitus is a persistent ringing or buzzing in your ear that doesn’t have an external source. Hyperacusis is a hearing disorder that causes an oversensitivity to sound. Tinnitus and hyperacusis often ...

As the father of two deaf sons and the author of a book on the history of cochlear implants, I thought I knew a bit about hearing problems. I was still shocked by an e-mail I received some months ago.