>Gretchen,
>I knew a ballet group that was meeting in a large warehouse room -  
>they covered the walls with large grey cardboard egg flats - you may  
>have seen them, they carry more eggs than the traditional cartons,  
>though those can also be used. I think one of their members/friends  
>had a chicken ranch....Not sure where you can get them, or how much  
>they cost, but they do absorb sound and keep it from reflecting all  
>over.
>Martha

OMG

This is what can happen when you improvise with sound deadening material:
http://en.wikipedia.org/wiki/The_Station_nightclub_fire

Cardboard? Cardboard!? CARDBOARD!!!

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