DIY Soundproofing Panels

On occasion I am making music, so I decided to make a music/sewing room in my spare bedroom. The major problem is that the acoustics in this room are not the best. Too many flat surfaces are reflecting the sound. So I made some soundproofing panels, which absorbs the sound and keep the neighbors sane. Because of the filler material used (200x100x4 cm soundproofing foam panels) I decided to make 4 100x100cm panels. I started with 16 wood slats of 100x4x2cm.

 Using wood screws and metal angles I made 4 frames.

Laying a frame on backing fabric, I used staples to stretch the fabric onto the frame. It is important to give the fabric a lot of tension.

I cut my foam panels in half, giving me 100x100x4cm panels (black cat for scale).

I put the front fabric down and put the foam and the frame on top. Similar to the backing fabric I stapled the front fabric to the frame.

On the back side I hammered two nails into the lateral wood slats. I connected the two nails with a thick wire, which I used to hang the panels on the walls. And here they are:

I the rectangular room I have one panel on one wall....

...two panels on the side...

...and the last panel on the third wall.

And what should I say? It works!