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I have just about settled on my final tube sound system, and the last thing to improve is room acoustics.Has anyone applied cork wall tiles or cork sheeting to their listening rooms? And what was the improvement (if any). I am thinking of adding cork to my main facing wall to the speakers, which is behind my listening position, as I believe there may be mid to high frequency reflections going on. I have marble floors (in spain) but have a large central rug and curtains.
Can I paint the cork with a thin covering of water based white paint? Will it keep the sonic benefits with the paint applied?
Thanks in advance!
Follow Ups:
Do not use cork it is to hard, we
suggest you chekcout this company...http://www.acousticsfirst.com/products.htm
We used AFCT2 ceiling tile
p# 12152
very light weight comes in sculptured form if desired.
Cover about 1/3 of the area of concern, works well.Curtis J
Paint will add reflectivity back into the room. If deadening the high frequency is what you are looking for I would not paint the cork. You can simply cork a portion of the wall, too. No need to cork the entire surface. If the room is very reflective the area directly behind the listening position is the most important.You really ought to post more information: for example, the dimensions of the room, the distance your listening chair is placed from the back wall etc.
The closer you sit to the back wall the more important the dampening of that wall becomes. In a concert hall, any seat next to a wall is a bad seat. There are some speaker manufacturers, I know, who advocate sitting directly against the back wall, but these usually have unusual woofer positioning (facing each other, for example, where the direct opposition of the woofers will create a degree of cancellation).
You may want to look at Mike Greene's Room Tune products. His Corner tunes are very effective, but instead of placing those fiberglass stuffed pillows in your upper corners, simply drywall a wedge into the corner. They can look a lot more architectural if you make a long wedge and it does not diminish the effect.
Don't forget that you can use other means to dampen a room and be more aesthetically pleasing (not necessarily cheaper, though!). You can use fiber artwork, like quilts, and wall hangings. A friend who collects silk carpets has one gorgeous piece hanging behind him with a very pleasing effect sonically as well as visually. While more expensive, it also keeps the SO happier, sometimes.
Stu
Hey you guys! thanks for all the fab tips on cork and acoustics.I will do the wall application in the next couple of weeks, and add a post to let you know how it changed things.
My room is 4.5m x 4m x 2.5m high, with a double sliding glass door to the terrace to my left,
and an opening door into the covered terrace on the right side of the speaker wall to my front right. My cork wall is to be the one directly behind my seated position, so it should have an effect I reckon. I have marble floors on concrete, so no floor vibes, a large rug in the middle of the floor, and drapes to the terrace sliding doors. 2 sofas help as well, to beak up the reflections.I have a SET valve system, so I am pretty obsessed with the midrange and upper registers. My next tweak I think will be a powered sub that can fully integrate, to fill in the lower grunt.
Thanks again for the posts!
Your room is not exceptionally large. The marble floor and glass doors are obvious high frequency reflectors. The drapes are good, and the area rug is definitely a help. I am assuming the second sofa is situated across from the doors, and that helps break up the resonances on that wall.You will probably need some to break up the first reflection point on the right wall and a wall hanging or ornate acrylic with a lot of knife work helps a lot.
Problems always exist with the upper corners of the room. Without spending money try temporarily taping up a triangle of cardboard (roughly 25 cm on a side0 in each corner. The corners tend to act as megaphones, and sound enters the corner and gets re-reflected out reinforced. If the cardboard helps, a hanging silk plant, or a piece of drywall 'mudded' in makes a more permanent and aesthetically pleasing addition leasing. And yes, this would be a direct take off of Mike Greene's Corner Tune products.
If you have a relatively large area uncovered by your rug, say the portion behind and to the side of your speakers, use something like plants on the floor to help break up the reflection. The marble is nice, but it is reflective. I would recommend wooden or other organic sculptures to help break up the harder surfaces.
Let us know how it comes out. I envy anyone who can have a dedicated listening room.
Oh yeah: Apply the cork sparingly at about your listening height first. You may not need so much, as the cork will definitely absorb SPL's and since you have a SET (unless it's a 211/845 one!) every watt can make a difference! I once lined an entire room with cork and it was, well, over damped. We had to add framed pictures with lots of glass to add a bit of reflectivity to increase the presence.
Stu
Reno Events Center, those panels on the upper walls are cork and the REC sounds great. You might want to mix some diffusion with any added absorption though.Cheers
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