We Incorporate Sounds Into Our Dreams
If you’ve ever started to fall asleep while listening to a sound, and then incorporated that into your dream, you’re not alone. While sleeping, our brain processes all the stimuli that we experienced during the day. During deep sleep, or the later stages of non-REM sleep, the brain is less responsive to external stimuli and a person may be less likely to hear or remember sounds. Dreams typically occur during the REM stage of sleep, which is characterized by rapid eye movements and increased brain activity. During this stage, the brain is more active and people may be more likely to hear and remember sounds, although the sounds may be incorporated into their dreams in a distorted or surreal way. (Bored Panda).