Why Many Experts Advise Against Sleeping With the Window Open at Night

Why Nighttime Noise Matters More Than You Think

You may think you “sleep through” outside noise.

But your brain never fully shuts off.

With an open window, sounds slip in easily:

  • Passing cars
  • Sirens
  • Voices
  • Late-night deliveries or early-morning traffic

Even brief noises can pull you out of deep sleep stages.

You may not remember waking — but your brain does.

The result?

  • Less deep sleep
  • More tossing and turning
  • Morning fatigue

Many sleep specialists point out that consistent quiet matters more than most people realize.

But noise and air aren’t the only factors affecting rest.

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