Although dogs tend to lose their hearing as they grow older just like people, their sense of hearing is almost as strong as their sense of smell. (puppywire.com)
Children with this mutation start losing their hearing at around age 5, and may go completely deaf over the following decades. (newscientist.com)
He had lost hearing on one side, and the area was a mass of scar tissue and relocated nerves. (sciencedaily.com)