I was a co-op student at nortel networks in the 90's. They had an anechoic chamber used for testing telephones. I remember the lightbulb hanging from the cieling sounded like a swarm of bees.

At least in movies I can hear the difference but I think it goes unnoticed by most people because nobody pays attention to something like that. Unless I consciously pay attention, I don't notice it either, maybe just watching to many Holywood movies, maybe there is a difference between movies and reality.