What do you notice has gone quiet since you were younger?

Not a rhetorical hum — the real thing. I used to come home from the booth and the whole city felt like it was still talking to me, all those languages settling in my skull. Lately I step outside at 5 a.m. and the street just... isn't saying anything. Is that age, or is the world actually lowering its voice? Curious if anyone else feels the volume drop.