A rolled up newspaper might work, as well. In *my* day, we got a leather strap across the palm, or a wooden ruler across the knuckles. We still managed to survive.
Identical to the chamber we used at Nortel. First, anechoic (no reflections) is not the same as quiet (no external sounds leaking in), though anechoic chambers strive to do both. The cutoff frequency (below which the chamber ceases to be anechoic) is pretty much a function of the size of the wedges. IIR, ours was good down to about 50Hz. I spent some time in ours, it's not really a big deal, but the sensation is similar to having a stuffed-up head. And it's hard to talk to someone if you face away from them. The chamber was in a huge brick cube mounted on rubber blocks. Pretty neat.
In *my* day, we got a leather strap across the palm, or a wooden ruler across the knuckles. We still managed to survive.
The chamber was in a huge brick cube mounted on rubber blocks. Pretty neat.
http://www.youtube.com/watch?v=t3TAOYXT840