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Hey all,
I recently moved and my new listening room is giving me a huge pain in the @$$. The room is about 9'x21'. From the centerpoint of each speaker, they are about 95" apart. The room was converted from half of a garage and the walls are stained plywood. It looks a lot nicer than I'm making it sound. I've deadened it fairly well with whatever blankets and sleeping bags I can find along the walls and corners etc... It has helped and there are no obvious echos when I walk around the room and clap. There is still a very unfortunate resonance in the lower midrange. When I say resonance, I mean the tone becomes muffled and distorted. I'd say around the low end of a typical male tenor vocal range. It doesn't happen when only one speaker is playing and it doesn't happen when the speakers are out of phase (discovered purely by accident). I've moved the speakers all around the room trying to get rid of the resonance. So far it seems to be independant of room orientation. I only had the speakers a short time before I moved, but I'm pretty sure I would have noticed this in the previous environment.
I greatly appreciate any thoughts about getting rid of that pesky resonance.
FYI:
Speakers are GR Research AV2
Stands are DIY- sturdy and sand filled on spikes
Resonance is independant of music source (i.e. record or cd)
floor is carpet on concrete
Its not how many people you shoot ... its who you shoot
Follow Ups:
The key is in your signature line: It's not how many people you shoot... it's who you shoot.
Paraphrasing: It's not how many frequencies you absorb, it's which ones.
Find out which frequency(ies) are exaggerated and/or resonating, and then maybe we can figure out the source and hopefully solve the problem one shot-one kill instead of spray-n-pray.
Duke
Hint: Eddie Murphy
Nate
Its not how many people you shoot ... its who you shoot
I understand your position on this, but do not fully agree. First off let me explain that when I say broadband absorption, I do not mean to include the higher frequencies. If a complete room analysis was done, my bet is that there would be numerous problem areas just like there are in most rooms. Yes you could build specialty absorbers tuned to each offending frequency, but that would be a piece of work, and you still would miss quite a few.The broadband approach to bass trapping allows one to treat the room as a whole and in a simple manner that will smooth out the peaks and valleys. This will often take care of many midrange issues as well. A properly treated room will not deaden the room, but rather allow the natural lower and mid frequencies to be there unreinforced, nor cancelled out by minimizing the boundry effects.
Reflections are another story and if the bass traps are in a first, or second order reflection area, then they can be made to absorb the higher frequencies as well. Properly placed first order high frequency absorbers and diffusers will reall help this type of room with plywood walls.
With that being said, you are right in that there are different ways to approach the same problems. Some prefer reflection, refraction and diffusion to absorption of the higher frequencies. I think most rooms benefit from a well placed mix. Tuned absorbers can work very well and are a definate option.
I'd still try to figure out what the problem is before investing in a solution.
Duke
Hello,
Generally blankets and sleeping bags will only help on higher frequencies. From your description, I would suggest that you strongly consider some proper absorbers that will go lower into the frequency areas that you are having the actual troubles with.
I am a firm believer in broadband absorption. Some of these treatments can be expensive if purchased ready made, but are often easy and affordable built as a home project. Ridgid fiberglass of the Owens Corning 703 variety can do wonders in the proper areas and in the right thicknesses.
blankets etc... I certainly did not have in mind that sleeping bags on the wall would be a permanent solution. I'm just experimenting to try to determin if this room is treatable. Its a fairly small room and 360 degrees of plywood. I'm hesitant to invest much money before I know what I have to work with and if its even worth it.
I hadn't considered the broadband aspect of the materials I chose. Thats a great revectoring, thanks! I can't wait to get home and look at it again from that perspective. Why do we have to have jobs!?!? There is way too much tinkering to be done!
Are there any ready made FAQs out there or resources that you can suggest that I can study. I see my shotgun approach ending with multiple attempts and material purchases.
Thanks again for your help!
Nate
Its not how many people you shoot ... its who you shoot
You can find the raw materials reasonably at places such as this: http://www.sensiblesoundsolutions.com/There is a whole wealth of material here on the Real Traps site:
http://realtraps.com/articles.htmand this one: http://www.squidoo.com/diy_acoustics/
They are a good start and will help you set-up a game plan of what you may need and where. The actual construction of these panels is very easy.
I also suggest jumping into an acoustics forum where members can easily help you with all your questions. Personally, I have been involved with this one here on Audio Circle: http://www.audiocircle.com/circles/index.php?board=73.0
It looks like I got my work cut out for me.
Thanks,
Nate
Its not how many people you shoot ... its who you shoot
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