We are a group of people setting up a small rehearsal room for bands, mainly it will be young kids and teenagers that will use this room. We want the acoustics to be as good as we possibly can, we thought first an about covering the room with foam, but after some research online we found out it would probably be best to build our own acoustics panels with wool insulation.
Drawing of the space: Dimensions in CM. Lofthæð= Height Gluggar = Windows
There is also this small space within the bigger room where we wanna have a control room with a computer, audio interface and studio monitors.
Panorama picture of the space
What we thought about doing is:
What I would like to know, are we heading in the right direction?
there are also 2 windows in the room that we will close up and I was thinking maybe having diffusers where the windows are, Maybe that's not a good idea?
Also regarding bass traps would you put them in every corner of the room?
Looks like you are going in the right direction. Diffusion is good, especially is you are going to record live. (See Ethan's video re. his diffusors but sorry I don't have the link handy).
For practice rooms, I feel absorbers on the walls like you have them will quiet reflections and allow musicians to clearly localize the other instruments. Alternate panels on opposing walls. Ceiling clouds or other treatment will help too. This might be all you need.
Bass traps will help to tame room modes so if you have the space and $ go for it...and remember, a rectangular room has 12 corners, not just 4. You can also extend the LF performance of your wall panels (at least 4" thick) by mounting them spaced 4" away from the walls.
The common theory behind bass traps is the more the better.
Now, you just have to remember that the more bass traps will ultimately deaden up the room but to offset the deadening is to add diffusors so never worry about adding to much bass traps.
Take note what the experts or most of us will say, you can't get enough of bass traps the above just gives you an idea of what will happen when you do add a lot of traps not saying not to add them. My apartment is small but I have covered nearly 50% with no diffusors and it is no where near close to dead.
So the answer to your question, do you need to add traps all the way down? Yes, if you want. You can go about this in two ways, firstly you can just add to any corner you can get to regardless of all the way down, when we say corners we mean all floor corners and ceiling corners wherever and anywhere.
Or, you can just find out where your bass build up is and add traps there to start off with. Then add all the way down. The net will tell you, even Arqen's site says which corners are more prone to bass than others follow that path.
Diffusors usually go at the back of the room, so in a HiFi room its where the speakers point to, its the reflection from there that adds to the diffusion. In a studio I would say the diffusers will go around the instruments(probably behind) not where the window are well it depends where the windows are in relation to the instruments. Covering them is not a bad idea just depends on the windows location. What is the priority to covert them to stop the horrible sounding glass reflections or to add diffusion to the instruments?