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Audio and Video Talk
Acoustics & Room Treatment
Limp mass membrane for bass traps
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<blockquote data-quote="Strainger" data-source="post: 215569" data-attributes="member: 839"><p>Sorry, saved and sent the wrong one of the 'before' - used capture to save the jpegs, but never saved the graphs. I extended the time to 1000ms, just to try and find some end to the modal decay times. (Can it honestly be that much longer than 1 sec??) But the main idea is to indicate the difference in the lower frequencies after the panels was installed.</p><p></p><p>Unfortunately I do not have enough graphs of before-the-panels - discovered REW too late. </p><p></p><p>Just for interest's sake: Here I moved the speakers back 20cm (which made an audable difference in the muddled bass), and then took some measurements at really loud volume, all at different lengths and numbers of sweeps. There are four readings overlayed, and no smoothing applied:</p><p><img src="http://i1174.photobucket.com/albums/r605/Strainger1/FourReadingsLoud.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Waterfall of one of above:</p><p><img src="http://i1174.photobucket.com/albums/r605/Strainger1/LoudWaterfall.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Then measured left vs right speaker separately at same settings as above:</p><p><img src="http://i1174.photobucket.com/albums/r605/Strainger1/LeftvsRightSpkrs.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>We can clearly deduct from all these measurements... I have no clue! Think I'm having a meltdown, data-overload, etc...</p><p></p><p>Will get back to it tmrw... Thanks for your responses!</p></blockquote><p></p>
[QUOTE="Strainger, post: 215569, member: 839"] Sorry, saved and sent the wrong one of the 'before' - used capture to save the jpegs, but never saved the graphs. I extended the time to 1000ms, just to try and find some end to the modal decay times. (Can it honestly be that much longer than 1 sec??) But the main idea is to indicate the difference in the lower frequencies after the panels was installed. Unfortunately I do not have enough graphs of before-the-panels - discovered REW too late. Just for interest's sake: Here I moved the speakers back 20cm (which made an audable difference in the muddled bass), and then took some measurements at really loud volume, all at different lengths and numbers of sweeps. There are four readings overlayed, and no smoothing applied: [IMG]http://i1174.photobucket.com/albums/r605/Strainger1/FourReadingsLoud.jpg[/IMG] Waterfall of one of above: [IMG]http://i1174.photobucket.com/albums/r605/Strainger1/LoudWaterfall.jpg[/IMG] Then measured left vs right speaker separately at same settings as above: [IMG]http://i1174.photobucket.com/albums/r605/Strainger1/LeftvsRightSpkrs.jpg[/IMG] We can clearly deduct from all these measurements... I have no clue! Think I'm having a meltdown, data-overload, etc... Will get back to it tmrw... Thanks for your responses! [/QUOTE]
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Audio and Video Talk
Acoustics & Room Treatment
Limp mass membrane for bass traps
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