Sound absorption coefficient data

For every project that I've needed to use this table, I've started with the acoustic materials first. This usually brings he reverb times below 1.5 seconds and I do not enter the other materials. So I guess you could say the table is not very detailed with regard to all of the components in the space. It only shows that by using the acoustic material that we'll meet the reverb time requirements. The actual reverb time being slightly less than what is reported. If you wanted it to be more detailed (or are relying on typical construction materials to achieve the reverb time), I would just upload another pdf table called "typical construction materials" and list the absorption coefficients for the various materials you want to show. Maybe include at the bottom of the table where the values were obtained from. I think that would be sufficient.