A father ignored his hearing loss until his daughter, who took a class on it, pushed him to see a doctor. It was a brain tumor.

Even before she took a class at Auburn University on hearing loss, Rachel Ruhlin knew something was off with her father, Joe. 

"We would say something to him and he would not hear it or he would repeat things and we'd be like, 'Well, we just said that,'" she told CBS News. 

The more she learned, the more she pushed him to get his hearing checked. But he wasn't worried.