Soundman2020 - Studio Design Forum

Hi all, A friend of mine is overseeing the construction of some new dance studios in several arches under a railway. The dance company already have several units in use but they've just expanded to include the 3 adjacent arches (5 units). He approached me for advice on soundproofing the new studios ...

Btw I forgot to mention this earlier but I carried out several REW tests with slightly different mic-positions to determine which one was the most balanced. I got this idea from a post by Stuart in Stadank0's thread over on JS: http://www.johnlsayers.com/phpBB2/viewtopic.php?f=2&t=21368&hili...

4865 the plate below the speaker is to extend the baffle to match the sides and top of the baffle plate. Yeah this was my understanding, plus the lower panel catches reflections from the desk (not much of an advantage in my case as the desk will be very small). As I understand it, the pitfall of ma...

you've added something to the overall box-i-ness in the corners as well as highly absorptive space above. you're testing an incomplete system where you altered the LF cavity volume (less). and now you also have exposed a massive deep broadband absorber in an otherwise untreated room :-) i'd say add...

I'm back! Resumed work on the soffits after Xmas and I finally made it to the hanger stage! 269662303_311265037560250_8444669384862193684_n.jpg 269811559_625175728801304_6325884821112889346_n.jpg IMG_7357.JPG That's 12mm ivory insulation board with 50mm RWA45 rockwool on either side. I intended for ...

Hi gullfo! Fancy seeing u here :D symmetry is both physical boundary and the balance of absorption (generally some way of converting the acoustic energy into heat) and reflection control (scattering, diffusion, reflection). It's funny, if you look at the AV Nirvana thread I linked in post #52, John ...

4219 That is interesting! Something seems strange there. I'll send a message to John Mulcahy (the developer) and see if he can shed some light on this. Maybe it is phase-related, or simply due to the two measurements not being taken exactly identically... or gremlins in the software! Read my last p...

So I sought help from John Mulcahy (the author of REW) and he told me the apparent slow rise is an artifact of the way smoothing works on difference curves that include room reflections . Basically it is possible to generate a usable difference graph, but only for the direct sound from the speakers....

4042 Anyway, I took a quick look at your REW data, and one of the first things I noticed is that there is large difference in frequency response between your left and right speakers: Left-Right-Compare.png I don't think the trace arithmetic function in REW is working properly, Stuart. I've been hav...

So I did an A*B on my LR Difference graph and its inverse and it pretty much confirmed my suspicions: (AB)(BA).jpg If REW were working properly (A/B) would cancel out (B/A) and this resulting line would be completely flat at 0dB, but from around 200Hz upwards it starts spiking. Here it is with 1/6 s...

So I finally got around to doing my first REW test! First I sealed all the gaps & holes with Sikaflex PRO 11-FC (the sealant that Stuart recommends). I got a really good deal on a box of sausage refills (£35 for 20 300ml sausages!!!) but they only came in brown so now my soffit structure looks l...

There's an argument to be made for keeping everything as it is, with all the innards of the room exposed, sort of like one of those home-built PCs with a glass case where you can see all the mechanisms. THAT'S how good it looks!

I feel more often than not with these things that simple is better. I wonder by having so many layers/leaves each floated using Sorbothane is making things complicated in a way that could be detrimental. Maybe start with a design like mine and see how you get on? If that isn’t as good as hoped, tak...

So I thought some more about it & I think its fine? I realized that the graph I linked above compares double-leaf & triple-leaf systems that use the same overall thickness & mass. They're essentially doing the tests with the same number of drywall sheets & wall space. like so: https:...

Update: I'm beginning to reconsider my Sorbothane purchase... As it currently stands my housing box design uses a triple-leaf decoupling system (I said it was double-leaf earlier, my mistake!) - there's a 'layer' of Sorbothane pads between the speaker & the housing box, followed by another layer...