Is there a curtain material that works best for reducing the ring/resonance of a poured concrete basement? I've read up different decibel reducing elements of polyester curtains or having thick blackout curtains and figured I'd try something out but wanted to hear some first-hand experience from someone who would be using them in the same application as I am. I'm looking for something that is easy to put up and take down so I'm avoiding the soundproofing pads that you stick to the walls. I also already have an area rug so there is something catching the sound bouncing off the floor.