Eli5: Why can’t we hear our environment while we are asleep?

Question

Eli5: Why can’t we hear our environment while we are asleep?

In: Biology

Answer 1

You can hear your environment while you sleep, that why you wake up from loud noices around you. You just dont notice it because you are sleeping. Same goes for every other sense other than sight because your eye lids are blocking your vision but for example touch you do notice as you wake up when someone “touches” you hard enough. And smell aswell you can wake up because of bad smell.