29th June 2009 at 17:05
#57663
jjw
Guest
Some years ago I found a document, Electromagnetic Signal Attenuation in Construction Material, when I was looking for some information on signal attenuation. Search for NISTIR 6055 on the internet. This document was produced by the U.S. National Institude of Standards and Technology (NIST). I’m not sure if this is what you are looking for, but it might help you find what you are looking for.