That's a hypothesis but not evidence. I can present a counter-hypothesis: I fall asleep while listening to music (or staying in silence). Listening to spoken wo

That's a hypothesis but not evidence. I can present a counter-hypothesis: I fall asleep while listening to music (or staying in silence). Listening to spoken word keeps me awake or at least helps me notice that I'm getting tired. 1.2 million people die in road accidents, and most of them are children and young people. Even more are seriously injured.