Is this right??

[blore_boy]

Hello all,

I have started the acoustic work on my HT room, after going through numerous threads on this very site and other sites on the internet, I have decided to do the following,

* Room is 580sq ft in area and I am covering 30% of the ceiling with Saint Gobain's Gyptone acoustic tiles, which is backed with 50mm of 16kg/m3 glass wool from Twiga. Also, a layer of glass wool cloth between the tiles and the wool, to prevent the glass wool from falling through the holes in the tiles.

Would this give me better performance or using rigid glass wool tiles??? Is there a lot of difference?

* On the walls, wooden frames sealed with silicon across the extremities. Upto 3ft height I will be using 2 layers x 50mm of 32kg/m3 glass wool(Twiga) and above that, single layer of the same glass wool. Again, cover with glass wool cloth, followed by wood wool boards from Vinardex(18mm thick). Over this, thin layer of yellow sponge which is encased by cloth(type undecided) using gripper system.

The Anutone guy who visited my site suggested that I use metal frames instead, as they provide better performance when compared to wood. Is this true??

He also told me to go for Anutone Synth PF, instead of the typical glass wool, citing better performance. Can anyone confirm this?

Even the wood wool board, he claims the ones from Anutone provide far better performance when compared the usual wood wool board.
-------------------------------------------------------------------------
Soooooo, am I doing this right?? There are people on Hifivision who are far more knowledgeable than I am regarding this, hence, I request you guys to tell me if any changes have to be made in the acoustic work that I have mentioned above.

Oh, I almost forgot, in the rear two corners of the room, I will be installing triangle shaped slabs of rock wool, stacked one over the other, all the way till the false ceiling, which will serve the purpose of bass traps. The apex of the triangles will be cut, so as to create a little air-gap.

Thanx!!

 

[sdurani]

What are you trying to accomplish? Soundproofing the room or tuning the sound in the room?

Also, is this for a stereo set-up (2 speakers) or a surround set-up (5-7 speakers)?

Your treatment plan seems somewhat random. Are there specific problems you're trying to fix?

 

[yahoo0212]

Is 16kg/m3 enough for the ceiling.. I guess you need to go for 32 on the ceiling as well...Suggestion from other members//??

 

[blore_boy]

What are you trying to accomplish? Soundproofing the room or tuning the sound in the room?

Also, is this for a stereo set-up (2 speakers) or a surround set-up (5-7 speakers)?

Your treatment plan seems somewhat random. Are there specific problems you're trying to fix?

Both, I am trying to sound proof and tune the sound. The room has always been prone to echos, so I have to do something about it.

It is a 7.1 setup, 90% for movies and 10% music..... I don't understand what you mean by "random". Is there something wrong with what I am doing??

 

[sdurani]

I don't understand what you mean by "random". Is there something wrong with what I am doing??

For example, you said you were planning on "covering 30% of the ceiling". How did you decide upon that number, as opposed to say 25% or 40% of the ceiling? Where on the ceiling do you plan on placing those treatments?

 

[blore_boy]

For example, you said you were planning on "covering 30% of the ceiling". How did you decide upon that number, as opposed to say 25% or 40% of the ceiling? Where on the ceiling do you plan on placing those treatments?

I have come across threads which say that, too much work done will make the room acoustically dead. The room is rectangular in shape and the area of the ceiling that I plan to cover, roughly works out to 30%.

Should I increase this to more than 30%??? Is 16kg/m3 ok, or should I go for 32gm/m3? Also, is gypsum(with holes)+glass wool good or is it better if I had opted for glass wool tiles?

I AM CONFUSED!!!!

 

[john_k_antony]

Hi,

I am going to do acoustics for my dedicated HT room in June.

My room is 24' x 15.7' x 10'

I am planning to do the following

1. Cover the entire ceiling with Anutone Subtex in ebony color - Anutone - makes you feel good. I need to cover the entire ceiling as I need to pull speaker cables, HDMI and power cable to PJ. I might be going in for 15mm Subtex sheets. The false ceiling will be at 1' from the ceiling. This will reduce the room height to 9' after the false ceiling is installed. With Subtex tiles, you don't need to back it up with glasswool / rockwool.

I was told that you should be little careful in working with Subtex tiles as it can cause some irritation if the tile is torn / cut.

2. For wall treatment, I am planning build 2x4 frames with Anutone Strand SS board (uncolored) - Anutone - Drywalls . Ceilings . Panelling . Acoustics and then fill space between the frame and Strand board using Anutone Synth PF - Anutone - Drywalls . Ceilings . Panelling . Acoustics and them covering the frame + Synth + Strand board using a jute based fabric. I am planning to get 15 mm, 2x4 Strand boards. Again the frame can be built using metal/wood. Not decided what to use now.

3. I am planning to build the corner bass traps using wooden/metal frame and filling it using Synth PF.

Now the approximate cost.

1. The Subtex ceiling sheets cost 95/sft. With full installation it will cost around 150/sft including labor and materials.

2. Synth PF will cost 51/sft.

3. Strand board (uncolored) will cost around 75/sft. So a wall treatment frame will cost around 150/sft including frame and labor cost.

Hope this helps.

Thanks,
John.

 

[sdurani]

I have come across threads which say that, too much work done will make the room acoustically dead.

OK, that's a good place to start. Too much absorbtion will make the room sound dull and lifeless. To avoid that, you need to target the locations where you place absorbtion.

For the ceiling treatments: first, finalize your speaker locations up front; then, while seated in the main listening position, have someone slide a hand mirror across the ceiling in front of you to find the first reflection points. Put a large (3'x3' or 4'x4') panel where ever you see a reflection of one of your front speakers.

This way, you've knocked out the reflection and cut down on the echo-y sound you don't like, but haven't over-dampened the room. You can do the same for side wall reflections if you want.

 

[blore_boy]

OK, that's a good place to start. Too much absorbtion will make the room sound dull and lifeless. To avoid that, you need to target the locations where you place absorbtion.

For the ceiling treatments: first, finalize your speaker locations up front; then, while seated in the main listening position, have someone slide a hand mirror across the ceiling in front of you to find the first reflection points. Put a large (3'x3' or 4'x4') panel where ever you see a reflection of one of your front speakers.

This way, you've knocked out the reflection and cut down on the echo-y sound you don't like, but haven't over-dampened the room. You can do the same for side wall reflections if you want.

Thanks, will try this out. Any opinion regarding the rest of my setup??

 

[blore_boy]

Hi,

I am going to do acoustics for my dedicated HT room in June.

My room is 24' x 15.7' x 10'

I am planning to do the following

1. Cover the entire ceiling with Anutone Subtex in ebony color - Anutone - makes you feel good. I need to cover the entire ceiling as I need to pull speaker cables, HDMI and power cable to PJ. I might be going in for 15mm Subtex sheets. The false ceiling will be at 1' from the ceiling. This will reduce the room height to 9' after the false ceiling is installed. With Subtex tiles, you don't need to back it up with glasswool / rockwool.

I was told that you should be little careful in working with Subtex tiles as it can cause some irritation if the tile is torn / cut.

2. For wall treatment, I am planning build 2x4 frames with Anutone Strand SS board (uncolored) - Anutone - Drywalls . Ceilings . Panelling . Acoustics and then fill space between the frame and Strand board using Anutone Synth PF - Anutone - Drywalls . Ceilings . Panelling . Acoustics and them covering the frame + Synth + Strand board using a jute based fabric. I am planning to get 15 mm, 2x4 Strand boards. Again the frame can be built using metal/wood. Not decided what to use now.

3. I am planning to build the corner bass traps using wooden/metal frame and filling it using Synth PF.

Now the approximate cost.

1. The Subtex ceiling sheets cost 95/sft. With full installation it will cost around 150/sft including labor and materials.

2. Synth PF will cost 51/sft.

3. Strand board (uncolored) will cost around 75/sft. So a wall treatment frame will cost around 150/sft including frame and labor cost.

Hope this helps.

Thanks,
John.

This is very informative, thank u!

 

[sdurani]

Any opinion regarding the rest of my setup??

Try to fix as many frequency response problems using speaker/subwoofer placement. Whatever you can't fix with placement alone, try treatments. What can't be fixed with placement and treatment, use the room correction built into your receiver.

Before you apply any treatment, be clear on what problem you're trying to solve. What you described in your first post, where every wall has absorbtion, is a recipe for a dull lifeless listening room. Not sure why you want that or how you came up with that plan. If you can't explain why you're putting treatment at a certain location, then you shouldn't be putting treatment there.

 

[blore_boy]

Try to fix as many frequency response problems using speaker/subwoofer placement. Whatever you can't fix with placement alone, try treatments. What can't be fixed with placement and treatment, use the room correction built into your receiver.

Before you apply any treatment, be clear on what problem you're trying to solve. What you described in your first post, where every wall has absorbtion, is a recipe for a dull lifeless listening room. Not sure why you want that or how you came up with that plan. If you can't explain why you're putting treatment at a certain location, then you shouldn't be putting treatment there.

I din't mean I will be covering every inch of the wall. There will be parts of the wall that I wont be covering.

 

[sdurani]

There will be parts of the wall that I wont be covering.

What parts?