Private studio in Slovakia
Posted: Sun, 2020-Aug-02, 13:31
Hey Starlight, Wow, that's great progress so far! Keep doing great work!
Cheers!
Francis,
Cheers!
Francis,
Superior Acoustic Assistance for Recording Studio Builders
https://forum.digistar.cl/
Well, I'd take those conclusions with a grain of salt. To start with, the one single GG result he includes in that paper (from 7 years ago), only tested down to 80 Hz, yet the comparison is against a different test that went down nearly an octave lower, to 50 Hz. It isn't a valid comparison. Yes, he does mention that in the document itself, but then why do the comparison at all, when he recognizes that it isn't valid? He also mentions that he could not find any data on Green Glue, but I guess he didn't look very hard, because there is quite a bit, easily available, from tests conducted at several independent acoustic test labs, in various parts of the world.Starlight wrote:[... that Green Glue is good but also that he rarely uses Green Glue in his builds. John explains why in one of the documents publicly available on his resources page, Sound-Proofing: The Quest. It is only 8 pages and well worth reading but specifically, he compares two STC tests, one from IR761 (which is in Stuart's Document Library) and one by the Green Glue Company. What John shows is that STC ratings are improved by using Green Glue but that STC ratings only cover 125Hz-4kHz. For music we want good performance down to below 20Hz, almost 3 octaves below 125 Hz. At these frequencies John prefers to add an extra layer of plasterboard/drywall to get better performance at all frequencies than use Green Glue for a better STC.
Right! It isn't cheap at all, and you probably do not need it. As soon as you complete your inner shell, you can conduct your initial isolation tests: I'm betting you will be fine with what you have. I only recommend GG where people need better-than-typical isolation and have the enough budget to go for more exotic solutions, and that usually is mostly for commercial pro studios, or places like that double-drum studio in Australia. We could have gone for an extra few layers of drywall to get similar results, but that would have taken off a couple if inches in each direction for the studio, which was already on the small side, and the cost was similar to that of GG. So we went with GG in that case.if I had used Green Glue it would have added around 1,600 Euros (£1,450, $1,900) to my build cost.
Right! I try to never make any statements about acoustics, or acosutic products, without first checking all the available data, and working through it. There's waaaaay too much well-meaning but misleading information out there about studios and acoustics (apart from the outright scams and hoaxes!), and I'd much rather be part of the solution, than part of the problem! Wherever possible, I'll always provide all the research I can to back up what I say. That's one of my goals with this forum: keep it solid, sound, scientific, and verifiable, with good research and resources to back it up. I want this to be a place where people can be confident that they can find "stuff that really works" for designing and building their studios.Stuart, I appreciate that you don't simply make claims but you go to great lengths to explain truths and challenge misconceptions
Who was it that once said:SoWhat wrote:Source of the postOne question: Are the boxes on the outside wall secured to the nailers (shelves), or are the nailers just acting as cantilever braces? I saw the metal brackets on the studio side.
It is now my turn to thank you, Paul, for spotting the obvious mistake! The baffle boxes are just resting on the nailers. I will attach them this evening or tomorrow.SoWhat wrote:Source of the postIt's so good to have multiple sets of eyes on this!
What a great idea! I haven't decided what to do, whether to just paint them or cover them with plasterboard or something before painting.SoWhat wrote:Source of the postI do hope you are going to faux paint them with a gingerbread theme...
My vote is for chocolate icing, with multi-colored sprinkles!Starlight wrote:Source of the post What a great idea! I haven't decided what to do, whether to just paint them or cover them with plasterboard or something before painting.
On a more serious note: congrats on getting those silencers in place: I bet that was a heavy job, and not so easy...
My vote is for chocolate icing, with multi-colored sprinkles!
Soundman2020 wrote:Source of the post... congrats on getting those silencers in place: I bet that was a heavy job ...
You are not mistaken, Paul, but we discovered that the splay of the legs was more than the size of the silencers so we could get them up to ceiling height but not close enough to the wall. So, in the end, we had to manhandle them. Our builder and I had no problem lifting them together. Thanks, Stuart, for the compliment; as you know, they could have been impossibly heavy but they weren't so we managed.SoWhat wrote:Source of the postIf I am not mistaken, Starlight is in possession of a drywall lift with enough capacity to get those things airborne.
I'll have to work on that. In the meantime, I guess you have seen through my pretence and realised that my caulk is in fact butter icing.Soundman2020 wrote:Source of the postMy vote is for chocolate icing, with multi-colored sprinkles!
my caulk is in fact butter icing.
It was a spur of the moment idea. I had taken apart the pallet the plasterboard was delivered on so that we could use the feet for the big nailers inside the studio and so two pairs of 2 metre slats from the top of the pallet were screwed together to give us two 2.5 metre stilts.SoWhat wrote:Source of the postDid you fabricate the stilts, or did you use those commercial scaffolding-type poles with the platforms on top?
That leads me to another possibility. I could, instead, have the duct run into a plenum which has at least twice the cross section of the the duct and have an outlet opening that drops air above the AC - but not above the treatment or cloud as that seems pointless. Something like this: What are your thoughts? Can you see the pros and cons of each possibility?Soundman2020 wrote:Source of the post... you need a very large, sudden change in cross sectional area to get a decent impedance mismatch. At least twice or half the area.
That gets my vote!Starlight wrote:Source of the post That leads me to another possibility. I could, instead, have the duct run into a plenum which has at least twice the cross section of the the duct and have an outlet opening that drops air above the AC - but not above the treatment or cloud as that seems pointless. Something like this: