room acoustics: bonded logic, homasote, or...
I did a quick check of the "bonded logic" site and did not see any acoustical specs. But if you are dead set against the compressed fiberglas panels (which are the best performers for the money), I suggest you consult Sensible Sound Solutions about their acoustical cotton products. The guy who runs it, Bryan Pape, is knowledgeable and helpful. http://sensiblesoundsolutions.com/index.php?cPath=22 Kal |
hi kal, thanks for the lead. i will definitely look into the sensible sounds products. here's some info. on the acoustical properties of ultratouch: http://www.coler.com/pdf/UltraTouch%20Acoustic%20Comparison.pdf http://www.coler.com/pdf/UT%20NRC%20R13%20Testing.pdf i am not an engineer by any stretch, so if you have comments on these numbers, please chime in. thanks, gary |
The speaker/room needs to be analyzed before embarking on a 'fix' & enhacement. There is plenty of free software out there, 'Room EQ Wizard' for one. It is available at hometheatershack.com. You mentioned that you have finalized the speaker placement. Well, please keep an open mind until after you do some measurements. Speakers backed up to a wall is never optimal, but only you can figure what the trade offs may be. Also, go to the 'Real Traps' site, a lot of good information there. Study the 38% rule. Once you know the room issues are, DIY becomes easy and very inexpensive. |
The problem with "batts" is that they are not self-supporting and need to be framed. This makes them even more cumbersome and obtrusive than prefabricated rigid/semi-rigid fiberglass panels. Remember, these treatments need to be in the room (acoustically) to be effective. Putting them in walls will only affect sound transmission to other rooms. Again, I prefer semirigid compressed fiberglass for its effectiveness and convenience. If you have a philosophical objection to the material and prefer cotton, you encumber some inconveniences. Ask Bryan Pape of SSS. Kal |
i will be in touch with sss, and yes, i have made a deliberate choice in using sustainable/recycled materials. i'm actually hooked on the idea. i'll build some type of wall mount (hoping not to create something to hideous and/or embarassing) for the batting. it won't be going behind the wall. something about speaker placement. apologies, as my words about the back wall could be misleading. i used the cardas golden rule thing to determine speaker placement, and so the speakers are about 45 1/2 inches from the back wall with the same distance lying between speakers (from middle of woofers). speaker to respective adjacent walls is about 29 inches. my listening position is about 8 feet from the speakers. thanks again for the contacts. it will help for me to do some more analysis, as opposed to just the arithmetic. |
