Fashionable, compact, easy to carry MP3 is very popular among young people, many people almost every day “song not away from the ear”. But did you know that a small MP3, its maximum volume is equivalent to the volume of a plane taking off! If the improper use of MP3, will seriously damage your hearing health. MP3 improper use of hearing vulnerable to damage in general, the human body can withstand the volume is below 80 decibels. If long-term life in the environment above 80 decibels, there will be headaches, memory loss, insomnia and other symptoms; when the human ear to hear the volume of 100 decibels, a longer period of time can cause irrecoverable hearing damage; a long time by more than 120 decibels volume stimulation, auditory cells will be permanently damaged, serious cases will also cause hearing loss. In fact, any sound above 85 decibels can cause hearing damage, because the damage depends not only on the volume, but also on the length of exposure. If you are exposed to 90 decibels for 8 hours a day, it is enough to cause gradual and irreversible hearing damage. Therefore, experts also pointed out that, in fact, MP3 damage to human hearing is not inherent, but people use improperly caused by.