A quiet corner gives attention somewhere to stop defending itself.

In a busy room, most of your attention goes on guarding rather than on noticing. It sorts the noise, watches for interruption, holds a small readiness for someone needing you. A quiet corner mostly removes the need for that guarding, and what is left becomes available for something else. The relief is less about silence than about not being on duty.

Find one place near you that asks nothing of your alertness and go there without a task. A stairwell, a bench, an early bus. You are not trying to be productive there, only to let the guarding stop.