I set up my new recording office today and I wanted to do a before and after of adding sound dampening panels to a room. They help so much in controlling unwanted reverb and flutter. I purchased these six panels at GIK Acoustics.
Graphing The Difference
I used an app called ClapIR on my iphone to measure the before and after sound profile and get real numbers on what the sound panels do. You can see below that the after graph is much flatter, especially in the 1000 Hz and 8000 Hz range. Those two spikes fall right in the human voice range and can be real problems when recording.
You can also see that the after graph has lower echo time overall. Check the before and after section of the video above (around the 4 minute mark) to really hear a huge difference in the clap test.
More Before And After Audio
The audio recordings below are made with Voice Recorder on my iPhone and give a better idea of what the entire room sounds like.
Before Sound Dampening
After Sound Dampening
Let me know in the comments if you have any specific questions about the process. I would love to help make your room sound better