According to the World Health Organization, more than one billion 12 to 35-year-olds, risk irreversible hearing loss from exposure to loud sounds such as music played on their smartphone. To prevent noise-induced hearing loss and related conditions such as tinnitus, commonly experienced as a ringing sound inside the ear, monitor how loud and for how long, you listen to music. Sound is measured in units called decibels or dBA. Music played through headphones at maximum volume measure 94-110 dBA. Sounds at or above 85 dBA can cause hearing loss. Test your hearing today at a professional hearing centre.