I think there are a few ways to wake up something without sound. You could do a little machine that poke you until you wake up, or throw a glass of water to you

I think there are a few ways to wake up something without sound. You could do a little machine that poke you until you wake up, or throw a glass of water to your face (although it could miss it you move too much) or something like that. Anyway, I think it is a good question and could get more answres in Reddit :D