Spectrograms & Waterfalls of BAD-sounding rooms

[hasan]

Hi there!
Does anybody have screenshots from REW of spectrograms/waterfall plots for BAD-sounding rooms? I wish to study these. They can be for 10'x10'x10' or other nasty dimensions. The screenshots should point out where most of the problem frequencies (or their groups) are located. I'd like to know how good are the calculators available on the web (or one's own EXCEL-based spreadsheets for modal calculations). Do the two match, and if they do, then how much?

 

[Sonnie Parker]

Have you looked at the Room Simulator in REW?

 

[hasan]

Have you looked at the Room Simulator in REW?

Sonnie, my man. Alabama is a pretty good band.
Thanks for the righteous pointer. Your message arrived just as I was reading the Sodom/Gomorrah/Abraham/Sara episode. No kidding! I don't know what THIS means acoustically! I had wandered off in the desert of Excel data for a short few days but certainly not for 40 years.
Now, I need to compare each indication of the ROOM SIM with the Excel data to see if things make good sense WITHOUT making acoustic measurements using a mic, an USB interface etc.
I partially partitioned my room (see attached image). The ROOM SIM is indeed showing the 'frequency response' plot for this new arrangement of 10' width, 16' length, 10' height. I also fed in approximate numbers for 'surface absorption coefficients'
Of course, I can toggle options for various types of modes but I guess REW will only go so far, and big-bucks software will provide more microscopic analysis.
Real life screenshots of bub-bub-BAD rooms will help in showing friends all the sad effects that ruin good audio. Unfortunately, not everybody can imagine or sense what happens in coloured rooms.
Thanks again and stay blessed.