Hearing problems like 1)tinnitus, once 2)encountered mostly in old age, are now affecting people in their teens and twenties, and 3)audiologists have identified the 4)culprit: earphones.

• 像耳鸣这类以往老年才会遇到的听力问题，现在十几、二十岁的人就碰上了，而听力专家已经找出元凶：耳机。