Mineralwool with 100 kg/m3 also ok?

Hi all, is it possible to use mineralwool with a density of 100 kg/m3 for broadband absorber and bass absorber, or is the density too high? Thanks in advance... Hendrik

Do you know how many pounds/cubic foot that works out to be? I think 8 pounds per cubic foot <b>IS</b> too dense and will cause the sound to glance off of it except signals that are "straight on" len

len-morgan wrote:

Do you know how many pounds/cubic foot that works out to be? I think 8 pounds per cubic foot <b>IS</b> too dense and will cause the sound to glance off of it except signals that are "straight on" len

around 6,5 pounds/cubic foot...

I'm afraid I'm going to have to let someone a little more knowledgable than me take it from here. 4 pcf is good and 8 pcf is too high so you're right in the middle. I guess the best I can say is that it MIGHT work and it's better than 8 pcf. Sorry I couldn't be more helpful. len

No problem. Thanks anyway....

Hendrik, if that's all you have available it will work better for bass absorption, especially in broadband corner traps; however, if you can't find any lighter stuff (3 PCF, or 48 kG/m^3, is ideal) then you may want to face the dense stuff with something lighter; you can cover it with a good grade of acoustic foam, for example - also, normal weight spun fiberglass insulation (no facing) in front of the denser stuff makes for a thorough absorption range. The main place you'll want less dense stuff in front of your heavy stuff is for ceiling clouds and sidewall first reflection points; you may not need it for corner traps at all... Steve

Thanks Steve! Best Hendrik