Sound is the architecture of our atmosphere. Even in silence, the brain is listening. It scans for threat, for movement, for interruption. The hum of a refrigerator. A car passing. A child shifting in the next room. Sleep is not simply closing your eyes. It is convincing the nervous system that nothing requires your attention. That is where noise enters. White noise machines glow on nightstands. Brown noise loops on Spotify. Pink noise is quietly studied in sleep labs. Each p

Night begins much earlier than when your head touches the pillow , but in the quiet moments when the body senses the day’s hold loosening. This transition is subtle yet profound: cortisol levels decline, serotonin gently converts into melatonin, GABA activity calms neural circuits, and the vagus nerve nudges the body toward repair and restoration. Understanding the Body’s Evening Transition The body’s journey into sleep is a biochemical and neurological unfolding. Cortisol,