Acoustic Panels

[rlyach]

Yes, I am very happy with the Orcas. I just realized that the white noise source file has no data below 86 Hz, so the bass response is probably not accurate, although the frequency sweep data seems to also point to a bass limit of around 75Hz. The Orcas have an amazing frequency range, and I am very glad I decided to go with the them.

[2wo]

Have you tried a program like REW? It sounds like you have a mike. The program is free and had tis one built in test signals...John

[rlyach]

John,

I am using SignalScope by faberacoustical. It also has built in test tones. I am using this on my iPhone using the built-in microphone. You can also use an external mic as well. The iPhone mic is actually pretty good, although they have a 20KHz 3rd order filter on it so it drops off pretty quickly. You can also export either a graphical output file or a comma separated data file that can be directly imported into excel. Thanks for the reference to REW. I will take a look...

[Grainger49]

Randy,

Now that you have a good source, how about adding a before to the above post so we can see side by side comparison of what the sound panel did?

[rlyach]

Grainger,

Here is the final comparison. I put the microphone on a stand at my ear position, and took data with and without the panels. The difference is definitely measurable, and in general the panels made the sound tighter and more uniform. The standard deviation is lower with the panels. The bass response is also lower with the panels. The mid-range frequencies up to 2k have more peaks without the panels. Above 2K the response is almost the same. Here are three graphs. One full range over the audio spectrum. One from 100 to 1K and one from 1K to 10k.

[manis]

It's confirmed. I definitely need to get/make some panels!