Here’s a personal observation I’ve made over numerous occasions…but I didn’t even want to believe the conclusion. And that is: sleeping either listening to my iPhone (you know, to meditative music or a podcast) or having my iPhone even near me (by the pillow/on the bed) greatly messes up my dream quality and recall. I mean: messes them up to the point where it almost “bleaches” them out completely.
The first time I noticed this was after I temporarily “banished” my phone from the bedroom after reading an article about its possible impact on the pineal gland. To replace the uses of the phone for my sleeping needs, I bought a little battery-powered wooden alarm clock and an inexpensive Conair sound machine (for white noise). Not only did I sleep better, but my dreams were far more vivid & I remembered more of them when I awoke.