When you set on earphones, you shelter your ears from the normal air, which flows the making of bugs by 700% in 1hr. Your drum naturally cannot bear an arrival of microorganisms in that amount so it starts to respond by worrying or earshot loss in the extended term. Furthermore, once you are listening to wild music/ high beat sound which goes straight to your brain owing to headphones, it touches the fine tissue/skin of the brain finally listener becomes hyper or happy which is bad in long run. Reasonable about all you put in your ear will increase the levels of bugs simply by the outline of a distant object to your ear. Think of your digit, cotton swab, and whatever else you put in your ear. With the right bacteria, humid and hot environs like the ear, nose and entrance have all the right situations for a origin fest. This appalling statistic came from a training way back in 1992 when specialists measured germs on 20 headsets. Whether this disturbing number is true or false is almost impossible to control.