Sound travels by vibrating things. First the molecules in the
air vibrate. This makes the ear drum vibrate. This makes three
small bones vibrate. The three bones are the anvil, hammer and the
stirrup.
Yes, sound is recognized by the brain through your ears. When
you hear a sound, it enters the ear canal to the eardrum. The
eardrum causes small bones to vibrate, which causes tiny hairs to
send signals to the brain.