franman wrote on Thu, 01 November 2007 20:54 |
Fig, Just curious about what your 're-purpose' will be... <snip> So, Fig.... what's your project?? |
Fig wrote on Fri, 02 November 2007 12:00 |
Can you provide a link to the products you suggest? |
franman wrote on Sat, 03 November 2007 15:43 |
... of course, what do I know? I'm just an old pony-tailed studio rat!! |
franman wrote on Fri, 02 November 2007 01:54 |
Fig, Just curious about what your 're-purpose' will be... BTW guys, we use Mason EAFM, Super W and FS/FSN for almost all of our projects. Kinetics RIM also on tighter budget slab products and roll-out for some projects. The engineering involved in properly floating a room is extensive. Loads must be accurately calculated (as per Guilfo) or it just doesn't work.... We spend a lot of time on this for every project and then we have the vendor review the designs for a double-check.. Anyway, the U-Boats are not my favorite. I just feel the rubber is way too stiff and there isn't enuf deflection. Deflection is what it's all about on resilient isolators. The resonant frequency is a directly related to the amount of deflection so if the pads don't 'give' (Compress) at least 1/4-1/2" then you aren't really isolating anything in the lower two octaves, which is what this is all supposed to be about anyway.... So, Fig.... what's your project?? |
Dusk Bennett wrote on Mon, 17 November 2008 23:14 |
Let me play devils advocate for a second here. While I have not seen anything from Auralex to substantiate their claims on the U-Boats (that they alleviate 50-90% of LF vibrations above 40 Hz), they do claim they have proven this via tests at Riverbank Labs. Riverbank is for real. You seem to imply, however, that these pads dont really work that well. Why? Is it because you have found through empirical study that these pads just blow or that there are too many other products that work better for the price? I'm curious. |
andrebrito wrote on Thu, 20 November 2008 11:22 |
[...] and also the risks associated with using such a light upper floor creating a high MSM ressonance of the entire system. |
Thomas Jouanjean wrote on Fri, 21 November 2008 02:54 |
Beware that using those systems requires both acoustics and structural engineers to calculate static and dynamic loads, Loading pattern, resistance and type of concrete, resonance frequency of the floated floor etc. Not much of DIY option there... |
Dusk Bennett wrote on Mon, 17 November 2008 18:14 | ||
franman, I'm interested in your post. It seems you have experience with a variety of these products so you are probably able to voice your opinion. Let me play devils advocate for a second here. While I have not seen anything from Auralex to substantiate their claims on the U-Boats (that they alleviate 50-90% of LF vibrations above 40 Hz), they do claim they have proven this via tests at Riverbank Labs. Riverbank is for real. You seem to imply, however, that these pads dont really work that well. Why? Is it because you have found through empirical study that these pads just blow or that there are too many other products that work better for the price? I'm curious. The U-boats are not cheap so I would expect them to make a noticeable difference. I'd appreciate your feedback....I may have to float a floor in a studio and I want to be sure the money is well spent. Thanks in advance! ---- Dusk Bennett Chief Engineer Recording Arts Department-- School of Film and Television Loyola Marymount University Los Angeles CA www.lmu.edu |
franman wrote on Sun, 23 November 2008 12:00 |
I have to look at the Riverbank data before I make any serious comments, |
avare wrote on Sun, 23 November 2008 17:04 |
The biggest issue with u-boats is that there is no test data, like Riverbank's, or even deflection data available to evaluate it, or to design floors with it. |
Thomas Jouanjean wrote on Mon, 24 November 2008 07:39 | ||
Then we know the answer: no data, no cigar. |
andrebrito wrote on Wed, 26 November 2008 22:08 |
This is the only data I know of... http://www.auralex.com/auralex_acoustics_faqs/faqs.asp?Q=17 |
franman wrote on Fri, 02 November 2007 01:54 |
Fig, Just curious about what your 're-purpose' will be... BTW guys, we use Mason EAFM, Super W and FS/FSN for almost all of our projects. Kinetics RIM also on tighter budget slab products and roll-out for some projects. The engineering involved in properly floating a room is extensive. Loads must be accurately calculated (as per Guilfo) or it just doesn't work.... We spend a lot of time on this for every project and then we have the vendor review the designs for a double-check.. Anyway, the U-Boats are not my favorite. I just feel the rubber is way too stiff and there isn't enuf deflection. Deflection is what it's all about on resilient isolators. The resonant frequency is a directly related to the amount of deflection so if the pads don't 'give' (Compress) at least 1/4-1/2" then you aren't really isolating anything in the lower two octaves, which is what this is all supposed to be about anyway.... So, Fig.... what's your project?? |
Dusk Bennett wrote on Thu, 27 November 2008 09:11 | ||
That's my point. There's no scientific research included in that. Typically manufacturers who build products for the construction industry include results from 3rd party scientific studies that support their claims. The fact that Auralex does not should raise a red flag. |