the volume knob
Nobody hears their own voice rise. That is the design flaw. Voices in a house go up by steps, each answering the other's step, and everyone sincerely believes they are responding, not escalating.
Here is a small, strange power available to any adult — lower your voice in the middle of your own sentence. Begin at the volume the moment demands, and finish softer. The room re-tunes itself around the quietest steady sound in it. Children lean in to hear the end of the sentence, and leaning in is the body's opposite of bracing.
This is not a trick to win with. Said softly, "the socks go in the drawer, not under the bed" is the same instruction — minus the weather.
Tomorrow morning, when the socks cannot be found, try the second half softer. Then let the morning proceed.