I WONDER - Can We Hear When We Are Asleep?

The video explains how our ears are constantly listening, even during sleep. The brain selectively ignores sounds to allow us to sleep unless it perceives a threat, such as a fire alarm, which prompts us to wake up.

Why do our ears continue to listen even when we are asleep?

What does the brain do to ignore sounds while we sleep?

Under what circumstances does the brain decide to wake us up from sleep?

What is the significance of waking up to a fire alarm at night?

How does the brain differentiate between normal sounds and sounds that indicate danger?