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Post by Mark on Apr 24, 2016 4:19:19 GMT
When setting up a control room with splayed walls, where should one measure to get the width determined by any common room ratio (example 1:1.4:1.9)? Measure the long or short end of the spayed walls for the width? Thanks!
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Post by Hexspa on Apr 25, 2016 5:26:35 GMT
afaik the "golden ratios" don't apply to rooms with non-parallel walls. See: www.acoustics.salford.ac.uk/acoustics_info/room_sizing/?content=best 7th pararaph (after the list). Your tolerance is 0.6m / 23.6in according to that page so if your angled walls are only so slightly then the ratios are still relevant. Also, according to that site, "golden ratios" vary depending on volume of the room. If you open the attached spreadsheet linked there you'll see the ratios for rooms of 50m3, 100m3 and 200m3. 50m3 is 1765.73ft3 (that and smaller are common in homes). The 22 ratios given on that page are considered scalable. |
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Post by Rock on Apr 25, 2016 12:33:46 GMT
I think if you take the mean dimension, you might end up with an approximation but that's just a guess. As you are probably aware, that splayed walls don't eliminate modes, the modes are just spread out and shifted in frequency. The idea of using ratios is not to have modes "pile up" at the same freq. so even with splayed walls, you could conceivably create some kind of "piling up" with certain dimensions. In any case, you'll probably need at least some treatment to suppress the modal ringing.
Cheers,
Rock
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Post by Ethan Winer on Apr 25, 2016 18:52:49 GMT
I'll just add that the usual approach is to average the dimensions. So if a room is 15 feet wide at the front and 25 feet wide at the rear, you can consider it as 20 feet wide for mode calculations. I never actually built such a room and measured it, but that's what everyone else says to do and it makes sense.  |
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