Axiom Home Page Forums General Discussion Advice from Axiom Owners Acoustic Panels

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Don't hold back Chess, tell us what you really think

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Well first God built the earth. Then he started with turtles.
That's my take on things.

>>>Chess, you mentioned that you were going to graph the room response. What program do you intend to use? I would like to try something like this as well.

Jordan you can order a Rives Audio test CD for $21(US) and then download either the color or black and white frequency chart to manually graph the room yourself. You can also download the test tones from RealTraps if you desire.

I have the Rives CD and am using the color frequency charts for manual graphing ... although I've only had the chance to graph a couple of times it's very interesting to view the results after slight room modifications such as doors open/closed, furniture placement and etc.
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Good luck with your DIY panel project Randy!

Hey Rick, did you get your Tri-Traps yet from GIK? I thought about building some 4' high superchunks which would be like yours, however, after talking to Ethan Winer and Bryan Pape on the other forums, they talked me into stacking clear to the ceiling.

Jordon, per BrotherBob's suggestions, the options presented are pretty reasonable for a DIY project (manual data logging). I was thinking of doing a complete 20-20 sweep and for that, i would need the Rives ETF software and a laptop.
At this point, i may not have easy access to a laptop and as such, may use the other approach...for now.

I finally go my graphs onto Photobucket - I would love to hear some comments. In my opinion, the treaments made a difference in the room - especially in 2-channel stereo. I also noticed a lot less "echo" and "reverb" when I clapped my hands together. Again, this is all subjective, but maybe the graphs tell a better picture.





I was running my sub a little hot when I made the graph and have since made an adjustment. I used the RIVES AUDIO 2 CD. What do you think?

Royce, can you overlay the two lines on the same graph?
The scale of your graphs is off making it a bit hard to follow changes in the curves.

What software did you use? Or did you manually measure the points with the test tones from the Rives cd?

Incidentally, i came across a website with a listing of a ton of audio software including some of the more common ones that pop up on Google. http://www.audiogrid.com/audio/

I used my Radio Shack meter to make manuall measurements.

I used Excel to make the graph - should not be a problem putting the two together.

Granted the measurements are limited here (and i completely understand why, who wants to measure all 19,999 Hz manually?) but it certainly appears as though some significant changes have occurred in the response.
The line is smoothed and raised from 80-125Hz, the dip around 250 virtually eliminated, and a much smoother, more shallow amplitude response between 315 and 1250. After that the changes are both pluses and minuses offsetting, but certainly would be enough to change the overall sound character of the previous room configuration.

In my enthusiast opinion i would say that the changes bring the line closer to flat than the original configuration.
I would still be curious to see more measurements in between though. I'm planning on doing either a complete 20-20 sweep if i can get software to record the numbers properly, or i may manually measure every 10 myself.
That damn ETF software (demo version) keeps giving me runtime errors. {sigh]