People? People are chaotic quiddities living in one cave each. They pass the hours in amorous grudge and playback and thought experiment. At the campfire they put the usual fraction on exhibit, and listen to their own silent gibber about how they're feeling and how they're going down. We've been there. Death helps. Death gives us something to do. Because it's a fulltime job looking the other way.
Perhaps sound is only an insanity of silence, a mad gibber of empty space grown fearful of listening to itself and hearing nothing.