Ah, but you can hear things still. As kleinbl00 mentions in that podcast, your body puts off about 15 DB's of sound, just due to breathing/heart pumping etc. We are never in true silence. If we were, it wouldn't be comforting, it would be startling. I have never experienced an anechoic chamber, but I would like to just so I can appreciate sound more for it's orienting nature.
I would like experience an anechoic chamber too, I know I'm never in complete silence but I like that almost silence that I can experience at night.
Most people don't do very well,mentally, for long in there. Once you can hear the blood pumping through your veins I guess shit gets weird.
I know they don't, I would like to discover how much time I can be there without going crazy.