Which to choose Pyramid Foam, Flat Foam or Build RockWool Panels??

[DanDan]

RockWool or FibreGlass or Poly insulation no doubt. In Europe Caruso Isobond seems very nice. Most of us here recommend 100mm with a 100mm airgap behind of possible. You can stick two 50mm together. Here's a great Trap design. Best DIY Trap EVER

DD

[tINY]

The foam doesn't work well on lower frequencies. If any of your trouble is below about 1kHz, I'd go with the Rockwool..



-tINY

[AndrewDew]

So by applying in the right way the panels (let's say I build 6-7 Rockwool Panels, I would make them free-standing for better use) 100mm and with the air gap of 100mm, I should be able to eliminate the annoying echo that I hear in the room?

The acoustic foam I found and indicated in the post won't get me these results?

I'm not looking for perfection with acoustics since the room it's not even build for acoustics but I want to stop having frequencies bouncing around the room and the echo. Do I need more treatment for these result than the one written upper?

[AndrewDew]

PS- I wanted to mention that the low freq echo (kicks and some bass) it's not letting me hear my mixes well

[Glenn Kuras]

That is still a pretty small room. A few things to get you started.
The Basics of Room Acoustics: Bass Traps, Diffusion, Panels - GIK Acoustics
Bass Traps and Understanding Low Frequencies - GIK Acoustics

[AndrewDew]

Thank you all for the replies. Gearslutz and it's members are always there with the right answer )

Just went today at the local store where I found pretty much all the stuff for
building some rockwool panels. Let's say that I will build them as DanDan said,
it's ok to use 40 kg, density ones or should I order from Internet the 60 kg density ones?

At the store the only have 100kg and 40 kg density, wich one is the optimal for absortion and bass trapping?

And since I read pretty much everywhere that rockwool is far better than fiberglass foam why companies still sell foam, does rockwool tend to have problems like moisture and deformation? Anyone heard differences between these two?

[DanDan]

Choosing between 40 and 100 in Rockwool, I would go definitely go for 100 for traps up to say 150mm thick. 40 tends to sag and droop. Straddling corners, including ceiling corners, the 100Kg would have a bit more of what Glenn and I call the 'drum head effect'. For thicker traps or filling corners I would go 40 and below, in frames.

DD

[AndrewDew]

So by using the 100 KG/mc It still reflects highs doesn't, it's not reflecting stuff? I'm just getting a little confused with all these kg/mc.
I've read a some threads on this site and saw that some guys go for lower density other for higher like 100. It's true that 60-70 kg it's optimal?
I may put two 100kg in the corners and lower density (60-40) on the early reflection and behind me, maybe some on the ceiling. It's easier for me to just buy all 100kg ones like u all guys said, Thank you

[DanDan]

Everests book shows little or no difference in performance of fibre absorption over a 4 to 1 range. Don't worry. 100KG will be absolutely fine. If you are going over six inches or so I would go for something lighter and cheaper. -And better when very thick.
bobgolds.com has tables of measured absorption coefficients.
Here's an example.

703, plain 4" (102mm) on wall 3.0 pcf (48 kg/m3)
0.84 1.24 1.24 1.08 1.00 0.97 1.15
705, plain 4" (102mm) on wall 6.0 pcf (96 kg/m3)
0.75 1.19 1.17 1.05 0.97 0.98 1.10

As you can see there is little between them as Lab measured.
Rockwool is a lot saggier than fibreglass.

DD

[AndrewDew]

Thanks to all for the advices. Dandan, going to get the 100kg ones. Thank you very much