Room Acoustics Forum by Rives Audio

Posted by Julien43 (A) on March 27, 2007 at 15:22:34

In Reply to: Re: 4inch 2' X 4' OC 703 panels Before and after measurments posted by Ethan Winer on March 27, 2007 at 10:56:33:

"You can't measure a room one day, then measure again another day - with a different microphone no less - and expect a valid apples-to-apples comparison. The main problem is the low frequency response in a room, even when treated with bass traps, varies a lot over very small distances. Even four inches away the response will be very different."

I'm still amazed at the huge change in tonal balance with each step I take while walking across my small room!

I loaded the appropriate calibration files for each mic, so that should help make the results a little more comparable.

Here are the plots

This is the first measurement

Here is the measurement after installing the panels

Well, the second graph looks a little cleaner, I don't really know how to interpret what I'm seeing, let alone the best way to improve the situation(besides squeezing in more traps)

I am going to get two 2'X4'X2" panels for the side wall first reflection points. I have my 12"X4' ASC type traps there now.
That would free up those traps to be placed for better effect
When finances and time allow, I will install two more 2'X4'X4" panels across the sidewall/ceiling corners

Thanks for taking the time and effort to share your knowledge and experience!!

Julien
"There's someone in my head, but it's not me"

• Re: 4inch 2' X 4' OC 703 panels Before and after measurments (with waterfalls) - Ethan Winer 09:13:26 03/28/07 (1)
  • Re: 4inch 2' X 4' OC 703 panels Before and after measurments (with waterfalls) - Julien43 07:04:33 04/01/07 (0)

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