I think I have heard one of my relatives saying that he is hearing something on his ears, little did I know that is called tinnitus, where you can hear ringing, swishing, or other type of noise that seems to originate in the ear or head. It is not a serious problem but kind of disturbing, according to what I have found out sometimes tinnitus can represent a serious health condition.
Some of the very common cause of tinnitus is damage to the microscopic endings of the hearing nerve in the inner ear. Advancing age is generally accompanied by a certain amount of hearing nerve impairment, and consequently chronic tinnitus. Another one is loud noise exposure , that makes listening music to your ipod is a risk and using head phone in your mobile phone. So I guess I should avoid using headphone in my computer when I need to watch TV show online.