Originally Posted by goneten
Thanks for answering my question. Here is another one.
How much better, in your opinion, is a 4" 36 kg/m3 panel vs 96 kg/m3 panel of identical thickness ?
Pricing for the 96 kg panels is like R100 per inch ($13) compared to R25 (slighter over $4) for the 36 kg/m3 panels.
I do not understand what you are seeking. The cheaper product is better. If it is 1% or 50%, it is better. 96 kg/m3 material at 4" thickness is starting to reflect low frequencies. It is not opinion, it is fact. Study the data on Bob Golds Aborption Coefficients
. The data shown for OC series has 96 kg/m3 and 24 kg/m3 material. The 24 kg/m3 has slightly less absorption at 125 Hz, and is 25% less dense than the 30 kg/m3 material you are refering to. Note that the best is with 48 kg/m3 for 4" thickness.
What are you after?