Why is it dangerous to listen to an mp3 player at excessively loud volumes for extensive periods of time?

Explanation:

There's certain limit about how loud we can hear sound, because our ears have a certain limit. According to the Centers for Disease Control and Prevention (CDC), noises above 70 dB over a long period of time can damage hearing perception, and 120d dB can cause immediate harm.

The sounds that are between 70 dB and 85 dB are:

As you can see, these sounds are common in our daily life. This means that we should not be exposed to these context for a long period of time.