TV bedtime habit carries a hidden REM sleep cost rooted in childhood safety cues
Many people fall asleep with the TV on not out of laziness but because childhood associations of voices in another room signaled safety; new research shows that continuous background sound, especially pink noise at about 50 decibels, can reduce REM sleep by nearly 19 minutes per night, a cost that accumulates over time and may affect memory, emotion, and development. The habit serves three functions—sensory masking, cognitive distraction, and ongoing processing during sleep—but the final impact is a less restorative sleep architecture. Changing the pattern usually works best with gradual decoupling (e.g., using a timer or audio-only alternatives) and addressing underlying anxiety rather than simply turning off the TV.
