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The World Health Organisation (WHO) is worried that 1.1 billion teenagers and people in their twenties and early thirties are their hearing by listening to loud music. It says nearly half the young people in middle- and high-income countries hearing loss because of the "unsafe use" of personal music players, including smartphones. Loud music in nightclubs, bars and at sporting events also the risk. The WHO a safe limit of to music for just one hour a day. The WHO director for injury prevention, Dr Etienne Krug, the BBC that: "What we're to do is awareness of an issue that is not about enough." He said hearing loss easily preventable.

Dr Krug said keeping the volume down and limiting the use of personal audio devices to less than one hour a day would a lot of people's hearing. However, he also said that, "even an hour can too much if the volume too loud". Ralph Holme, a biomedical researcher, how loud noise can ears. He said: "Loud sounds your hearing by killing off thousands of little hair cells in the inner ear. The cells different pitches of sound through vibration…but they are very fragile and if they too much due to loud sounds for too long, they get damaged and ." He warned that: "The problem is they don’t back and the ear can no longer detect sound."