After months of thinking and almost getting to it and then again forgetting the whole thing, I finally managed to grab a pack of fibre glass wool from work and getting some wood to build a few acoustic panels. I got 10cm thick Isover KL35 for the wool, since we had some spare packs lying on the site, and 12mm thick planks for the frames so that the panels wouldn't be too heavy to hang on the walls of my rented flat. For fabric I grabbed some dark blue, ordinary bed sheets from the corner shop. Corner irons and screws I got on my dad's account from the local hardware store since I bumped into him and he offered to get them for me. Here are some pics from the assembly (crappy quality, since they're taken in a really dark environment with my phone):
All the materials dragged into the extremely small, crowded and dark storage room in our basement. I could barely find enough room to use a handsaw to cut the planks :/ In addition, it was really fucking hot down there. I sweated like a little pig, and I'm running a fever so I had to pop out every now and then to get some fresh air.
I used corner irons and short screws to attach the planks to each other. Not the most convenient way to do it, but it was the first one to come in my mind so I went ahead and it worked fine enough. I made the frames pretty tight so the wool pieces stayed in place nicely without the fabric on.
Next, the fabric. I had to do this in the basement corridor 'cause the storage room floor was filthy and there wasn't enough space to lay down the sheets. I placed the frames (with the wool panels already in them) over the sheets, cut the fabric and stapled it to the planks. This was the most time consuming part for me, since even though I can handle the basic woodworking tools just fine, fabrics are a whole different planet for me. Also, I had to battle the voices in my head whispering "Gay... Gaaay... GAAAAY..." while covering the panels.
Here are the finished panels waiting to be installed. I still have to do two or three more, but I ran out of staples and fabric :/ I haven't figured a good way to hang them, either. They're small but still a bit heavy, so normal interior nails might not be enough to hold them. I'll pick some up tomorrow and see if they stay in place.

All the materials dragged into the extremely small, crowded and dark storage room in our basement. I could barely find enough room to use a handsaw to cut the planks :/ In addition, it was really fucking hot down there. I sweated like a little pig, and I'm running a fever so I had to pop out every now and then to get some fresh air.

I used corner irons and short screws to attach the planks to each other. Not the most convenient way to do it, but it was the first one to come in my mind so I went ahead and it worked fine enough. I made the frames pretty tight so the wool pieces stayed in place nicely without the fabric on.

Next, the fabric. I had to do this in the basement corridor 'cause the storage room floor was filthy and there wasn't enough space to lay down the sheets. I placed the frames (with the wool panels already in them) over the sheets, cut the fabric and stapled it to the planks. This was the most time consuming part for me, since even though I can handle the basic woodworking tools just fine, fabrics are a whole different planet for me. Also, I had to battle the voices in my head whispering "Gay... Gaaay... GAAAAY..." while covering the panels.

Here are the finished panels waiting to be installed. I still have to do two or three more, but I ran out of staples and fabric :/ I haven't figured a good way to hang them, either. They're small but still a bit heavy, so normal interior nails might not be enough to hold them. I'll pick some up tomorrow and see if they stay in place.