What is the best volume for headphones? Take Xiaomi mobile phone as an example. I usually drive less than half, about 45%. Does this count?

The volume control of earmuffs is almost 30%, because earmuffs are sealed headphones, which will not affect your health for three hours. The volume of in-ear headphones should be controlled at 2 1%. (In addition, if conditions permit, it is not recommended to use headphones, because no matter how long it takes, it will have more or less influence on listening).