Tue Nov 22, 2011 2:35 pm
Depends on the walls, and what is on the other end.
And no, describing the walls and what is at the other end in a paragraph won't help.
That question is impossible to answer, and doesn't make any sense to ask in the way you asked it. You may want to read about some wireless basics - the CWNA training books are very good, and not too expensive.
Matt attenuates EM. Different matter attenuates different EM frequencies in a different way - meaning it depends on the frequency, what EXACTLY the walls are made of (are they all the same?), how thick they are, what else is between the two wireless nodes, and so on. Then it also depends on the RX and TX sensitivity of the two nodes - some are better at weak signals than others.