Why does ear plug do nothing to sound insulate

[MelaninWarlord]

Asgard told me to use ear plugs to sleep better at night.
But I bought some from the chemist but I can still hear noise.

Any idea?

 

[Xuelian Baijie]

Asgard told me to use ear plugs to sleep better at night.
But I bought some from the chemist but I can still hear noise.

Any idea?

Put earmuffs on your ears at the same time

 

[MelaninWarlord]

Put earmuffs on your ears at the same time

I'm just worried about ventilation

I haven't worn headphones in years because of ventilation. I used to think the ear mouth and nose are connected.