The Effect of self-made Acoustic Panels

My Conclusions

• The frequency measurements show that many of the narrow peaks and dips have been rounded. A few other have appeared. In theory this should make for much flatter audio reproduction, which is something I desire.
• The time domain measurements show a massive reduction in reflection times. From many peaks over 400ms to only a few peaks over 300ms. I estimate the average is roughly 250ms now. My target is to get it <200ms so I consider this a massive improvement.
• The improvements are much smaller at low frequencies than high frequencies. The effect starts at about 35Hz and gets more effective at higher frequencies.

Overall I can definitely recommend to treat your walls with (absorbing) panels. Costs are limited and you gain time-domain improvements you can't even realise with buying more expensive HiFi equipment.