I've used anechoic chambers of varying quietness for making high-quality voice recordings a handful of times in the last year. I have to say that the effect of

I've used anechoic chambers of varying quietness for making high-quality voice recordings a handful of times in the last year. I have to say that the effect of being inside always surprises me. The air seems to have such an ethereal dullness to it, it's hard to explain. And even though everyone conversing in the room can hear each other in a literal sense, there is a constant feeling of your voice being lost and an inability to gauge the size of the room (probably the lack of echo reinforcement, I assume). Maybe I'm overstating the experience a bit because I find it so interesting, but most of my close colleagues agreed it evokes a clear emotional reaction. EDIT: I should say I've done this very infrequently, so I don't make any claims about people being unable to acclimate or what kind of tolerance variance there is. We had a few subjects that didn't think anything of it at all. (Although they were much older; maybe tinnitus diminishes the effect.)