Today with my group, we learnt about human hearing and animal hearing. I our ears we have something called the Cochlea. In between the lines of the Cochlea he have what's called Cilia (Hair Cells).
Cilia's are are very delicate and fragile. they can be damaged by having headphones on full volume or from other loud sounds. As you grow older you start to loose your Hair Cells. To prevent this from happening, you should have your headphones to the volume of medium, or anything lower and if you are doing anything that involves loud sound, than you can wear ear muffs or use something else that will help!