SPECTROGRAM CHANGE WITH STRATIGIC TWO INCH ABSOBTION

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dallaire1

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Thought this interesting as I make my way into the most important part of the system, room treatment. Here is the spectrogram data of the bare room and the treated room energy decay difference. Quite an amazing difference in the sound ! have not used Dirac since treatment. Hope to gain back a little decay time when the panels get wrapped as they will have a little less absorption and I can get a little closer to 400-500ms decay range. Bass traps are not a must but I am certainly building some soon as I want to get the room decay as even as possible top to bottom. Going to be unachievable at the sub region, but I'm certain I can get it reduced somewhat further.

BARE ROOM



PARTIALLY TREATED


« Last Edit: 26 Dec 2022, 04:14 pm by dallaire1 »


mresseguie

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Re: SPECTROGRAM CHANGE WITH STRATIGIC TWO INCH ABSOBTION
« Reply #2 on: 26 Dec 2022, 06:08 am »
I appreciate your demonstrating this with graphs. I do wish the graphs were a little clearer (a little too fuzzy for my not-so-young eyes), but I get the drift. My room is under-treated, but I've <finally> gotten permission to add panels to the rear wall.  :dance:

Michael









« Last Edit: 26 Dec 2022, 07:35 am by mresseguie »

dallaire1

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Re: SPECTROGRAM CHANGE WITH STRATIGIC TWO INCH ABSOBTION
« Reply #3 on: 26 Dec 2022, 11:59 am »
Nice, it truly is one of the best tweaks one can do to a system. Money well spent.

AllanS

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Re: SPECTROGRAM CHANGE WITH STRATIGIC TWO INCH ABSOBTION
« Reply #4 on: 26 Dec 2022, 01:53 pm »
Thanks much for sharing.  The difference in plots depicts an impressive result but I have little basis for interpreting results.  In basic terms how would you characterize the difference in what you’re hearing?  My guess would be less smearing / more detail and less fatiguing.  That’s certainly what I’m hoping for.
What software did you use?

dallaire1

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Re: SPECTROGRAM CHANGE WITH STRATIGIC TWO INCH ABSOBTION
« Reply #5 on: 26 Dec 2022, 03:52 pm »
Yes indeed, much more clarity in the mids and highs are nice and tame. Bass is even helped to around 100hz. What the graph indicates is energy in the time domain decaying in the room in milliseconds on the left side vs. frequency on the bottom. For music, I personally would like to see everything decay informally across the frequency spectrum although bass absorption requires a different treatment (bass traps) to get the low end to fall into line. I am using REW to shoot measurements.

AllanS

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Re: SPECTROGRAM CHANGE WITH STRATIGIC TWO INCH ABSOBTION
« Reply #6 on: 26 Dec 2022, 05:11 pm »
Excellent.  Thank you.  I have some treatments coming including front corner bass traps.
At first glance REW looks less intimidating than a couple of others I’ve looked at. I struggle with subjective comparisons so objective measurements will help assess treatments.
Thanks again.

dallaire1

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Re: SPECTROGRAM CHANGE WITH STRATIGIC TWO INCH ABSOBTION
« Reply #7 on: 26 Dec 2022, 06:31 pm »
For sure! Nice to actually "see" visually the differences. And then listen for the difference.