Video: If you’re looking to create a quiet recording environment without breaking the budget, a stack of old towels might be all you need. In this video from the DIY Perks YouTube channel, Matt Perks tests the sound absorption quality of cheap, easy-to-find materials. Perks tested thin, flat sponge; egg holder sponge; two layers of egg holder sponge; a seat cushion and a folded towel with a spread of 17khz, 13khz, 10khz, 7khz and 5khz frequencies. All in all, Perks found that a folded towel, either four layers thick or 12 layers thick, absorbed the most of all frequencies. Best of all, you can buy a bunch of old towels at op shops for only a few bucks. If you’re looking to build your own custom sound absorption panels, Perks shows you how in the second half of the video above.