The sounds you hear have more effect on your general experience as a human than you might expect. Right from babies to adults to really old people, hearing the right music (particular composition of sound waves) can help with wide range of circumstances. It has proven to help with physical as well as mental healing (for patients dealing with severe trauma), also right kind of sounds help develop perception related skills in baby brains. On a rather unrelated note, there is research going on about how to develop wearable tech for people who suffer from total deafness and they are getting interesting results, the sounds that subjects are "hearing" are of different frequencies i.e. they are hearing different sounds as compared to what an average person would hear given the same source.

PS: I'm sorry if you were kidding.