Do we hear while we sleep? Whoever told you that you shouldn't go to sleep with the TV on was right. Did they also tell you the reason is because something spooky gets absorbed into your subconscious? That part is a myth. However, there is some interesting science behind how sounds are processed during sleep.
With work, family, chores, working out and hobbies we find little to no time for sufficient sleep. Adequate sleep is worth the time because without it your jeopardizing your judgment, mood and your ability to learn/retain information. Long term your lack of sleep could become Chronic sleep deprivation and may have consequences of many health problems as listed