or Connect
AVS › AVS Forum › Home Entertainment & Theater Builder › Dedicated Theater Design & Construction › Another Erskine-designed masterpiece (if I don't screw it up).
New Posts  All Forums:Forum Nav:

Another Erskine-designed masterpiece (if I don't screw it up). - Page 8

post #211 of 441
Thread Starter 
Quote:
Originally Posted by rabident View Post

What projector? New Sony vw1000 looks like a winner for large screens. How big is your screen?

12' wide Stewart cinecurve screen. Projector is a Runco vx22. Haven't seen it in person, but the people that I trust say it ain't bad.
post #212 of 441
Thread Starter 
Quote:
Originally Posted by MarkDub View Post

Regarding your projector, I'm sure you've seen this before, but seriously - do NOT mount it or even think about putting it on a table, etc before you are actually DONE.

Good advice. And that is the plan. We'll see how much will power I actually have when the projector is on site. . . .
post #213 of 441
Anymore pictures of your walls with all the treatments on there?
post #214 of 441
Quote:


Looking at some of the photos, it appears that you have a 'triple leaf' wall construction, why would your acoustic consultant design such walls?

Nice shot across the bow. Not the case however...no triple leaf.
post #215 of 441
Looks like there is a drywalled exterior wall ana wood framed/drywall wall inside of the wall which is a double leaf wall, is it not?
post #216 of 441
Which images are you referring to?
post #217 of 441
Not the baffle wall, but the side walls, the pictures posted on 10-31-11, 05:27 PM show a view of the side walls with paper faced batt insulation between wood framing studs and then the picture below shows drywall on the wall.

I left a tube of green glue outsidelast night and it froze, can I thaw it and use it or should I throw it away?
post #218 of 441
Quote:
Originally Posted by KBlaw2010 View Post


There is sufficient space back there so as not to constitute a triple leaf with respect to the new side walls.

Thaw and bring the GG back to room temp and use
post #219 of 441
You still have a triple leaf wall construction, you have a cavity depth for the exterior wall which will resonate based on the depth of the wall + you have another wall cavity which will resonate based on this second cavity depth, you will end up with a gain for 2 different frequencies for the side walls.

If the space for the first leaf (interior wall) is great than the exterior wall then this space will resonate at a lower frequency than the outer wall
post #220 of 441
...then by extension, every playback space inside a residence will have at least 2 triple leaf walls. Therefore, all playback spaces shall hence forth be constructed in stand alone, dedicated structures and not be incorporated into an existing multi-room building. So, your home work assignment is to calculate the resonance frequency of each triple leaf, the energy in that resonance cavity, calculate the damping and absorption of each element and determine the resultant change in TL as a result for each wall.
post #221 of 441
Quote:
Originally Posted by rickjsr View Post

You still have a triple leaf wall construction, you have a cavity depth for the exterior wall which will resonate based on the depth of the wall + you have another wall cavity which will resonate based on this second cavity depth, you will end up with a gain for 2 different frequencies for the side walls.

If the space for the first leaf (interior wall) is great than the exterior wall then this space will resonate at a lower frequency than the outer wall

Not a Triple Leaf from a practical situation, just as Dennis said. Put a 6" or less air cavity next to the first, and you'll start measuring an effect. That gap in that little hallway is 24" at least.
post #222 of 441
WOW, that's quite the cavity, should visit your friendly neighbourhood denisty more often!!

Would the formulas from the attached doucment suffice...??

Didn't appear fom the photos that there was a 24" space between the walls, photos are deceiving thats why I asked the question...but I thought you would not install the DW on the exterior side.
Attachment 236416

Attachment 236417
The renosance of a 24" deep cavity, off the top of my head would be around 30-35hz.

So in simpy terms, if a double seperate wall cavity depth is such that it resonates at say 40hz, would it attenuate all frequencies above 40hz and any frequenices below would be heard on the otherside of the wall?

 

ctrl.pdf 480.9248046875k . file

 

nrcc43676.pdf 214.65625k . file
post #223 of 441
WOW Great looking HT!!

Thanks for posting all the pics and info.

I'm local..but scared see it.as I'll be ruined .. OK PM meruin me LOL

I'm buying a new place in Frisco with a 20' x 20' second floor media room, can't wait to hire Dennis to design it....soon
post #224 of 441
Quote:


So in simpy terms, if a double seperate wall cavity depth is such that it resonates at say 40hz, would it attenuate all frequencies above 40hz and any frequenices below would be heard on the otherside of the wall?

I would suspect that it would all depend on: (a) just exactly what the construction of wall one is; (b) what is inside the cavity; and, (c) more to the point, what the construction and design of wall two is.

Actually, I don't really suspect that, I rather know that plays a very significant role in the overall performance of a low TL structure.

Now, in the interest of courtesy to Mr. KBLAW, perhaps you should start a thread specifically on this topic. Make sense?
post #225 of 441
Hey, your right, sorry KBLAW, this is your thread, by the way your room is looking great so far, looking forward for more progress photos.
post #226 of 441
Just to finish up this sidebar convo, at low frequencies (30-40Hz) the two framed walls in question will act as single mass leaves. Below a wall's Mass-Air-Mass resonance point, the decoupled wall is re-coupled via the air. It's air-coupled. Our advantage of decoupling is gone.

By the time we get down to a 50Hz signal, the two boundary walls would have already been air-coupled and a LF sound wave would perceive that wall as a double wall, with essentially two solid leaves and a 24' (whatever) cavity in between. For a sound wave that large, there is no functional triple leaf.

KBLAW, thanks for indulging us.
post #227 of 441
maybe we can continue this in the 'Soundproofing Reviews' forum?
post #228 of 441
Thread Starter 
Quote:
Originally Posted by rickjsr View Post

Hey, your right, sorry KBLAW, this is your thread, by the way your room is looking great so far, looking forward for more progress photos.

No worries. I have been following the debate with interest. Just haven't chimed in because I only comprehend about every fourth word.

My gut tells me that Dennis and Ted kinda know what they are talking about, and I am glad they take the time to share the knowledge on the forum. I guess the final verdict will come in a few weeks when Adam Pelz comes in to calibrate the room!
post #229 of 441
Thread Starter 
Quote:
Originally Posted by Yzfbossman View Post

WOW Great looking HT!!

Thanks for posting all the pics and info.

I'm local..but scared see it.as I'll be ruined .. OK PM meruin me LOL

I'm buying a new place in Frisco with a 20' x 20' second floor media room, can't wait to hire Dennis to design it....soon

Sent PM
post #230 of 441
Thread Starter 
Here is a photographic update of some of the progress made in the past week:

Sconces installed over fabric panels:







Granite mounted on bar:




Diffusers installed:




Lights (before trim added):

post #231 of 441
Love it! The sconces are awesome.
post #232 of 441
Thread Starter 




post #233 of 441
I am going to set up my own "occupy" movement in your theater!!

I assume that is a 3D Runco projector - will you be using the Stewart 5D material? What type of lens sled are you considering?
post #234 of 441
Not 3D. 5D material is best for passive 3D. We only use active (so far).
post #235 of 441
Every time you post new pictures, it makes me hang my head in shame of my room. In a good way :-)

It really does make me want to build a new house..... and I've only been here for a year...


Beautiful beautiful design
post #236 of 441
Quote:


What type of lens sled are you considering?

Sorry, I missed this earlier. While you can purchase/integrate your own lens sled, Runco CIH projectors include an integrated sled and lens.
post #237 of 441
I guess for the price that is a good thing.
Just so I am clear, you mean the lens and sled are internal versus the external panamorph style correct?
post #238 of 441
No, they are external; but, mounted to the projector case with all the triggers and aspect ratios set up and ready to roll.
post #239 of 441
The room is looking great! Cool sconces, I really like those.

Congrats on the projector. Your daughter is adorable, too.
post #240 of 441
Quote:
Originally Posted by Dennis Erskine View Post

No, they are external; but, mounted to the projector case with all the triggers and aspect ratios set up and ready to roll.

ah, that makes sense. Ah, to dream!
New Posts  All Forums:Forum Nav:
  Return Home
AVS › AVS Forum › Home Entertainment & Theater Builder › Dedicated Theater Design & Construction › Another Erskine-designed masterpiece (if I don't screw it up).