The Grove Theater and Basement Build - Page 44 - AVS Forum
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post #1291 of 1302 Old 09-04-2014, 06:03 AM
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I bet that makes for an interesting audible change in the room's acoustics. Looks good!
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post #1292 of 1302 Old 09-04-2014, 06:20 AM - Thread Starter
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Thanks Fred. I must have a terrible ear because I tried listening for a difference between before and after and between left and right and I couldn't discern any difference. I have not watched a movie in there since adding the knauf to the rear wall but I did play music. Maybe once I get the whole wall complete and pop in a movie that I have watched before I will be able to hear an improvement.
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post #1293 of 1302 Old 09-04-2014, 06:28 AM
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Tried handclaps?

Under construction: the Larch theater
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post #1294 of 1302 Old 09-04-2014, 06:48 AM - Thread Starter
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I have not. Anything in particular that I should be listening for? Less sound bouncing around the room?

I need a crash course in ear training...
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post #1295 of 1302 Old 09-04-2014, 07:33 AM
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It might be hard to hear. Clapping is good enough to hear flutter echo, which is a nice and easy place to start. When flutter echo is bad, you'll hear a "zing" or "sproing" sort of tail to the sound. If you can't make that out in the theater, that's fine and good. Try clapping in a stairwell or parking deck. I'm of the opinion that flutter echo is just the beginning and the only thing you'll be able to identify by clapping, but I suspect others disagree (Nightlord). He may have a way for you to hear more spectral details of the decay, but I don't have a lot of faith in that.

Another easy way for you to begin to hear differences and the effect of the absorption is to stand right up next to it; one ear to it and the other out into the room. Get a simple recording playing - especially one without a lot of processing or ambiance added, or just get a conversation partner - and listen carefully, paying attention to the differences betwee what each ear hears. Stand next to untreated wall, and then move in front of the treatments.

Being able to hear subtle changes takes practice. I'm not good at it, but I'm working on it.
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post #1296 of 1302 Old 09-04-2014, 07:44 AM
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Nope, not in clapping, you described that perfectly.

Other thing to try is standing right up to the wall and listen to/feel yourself talk.

We were just discussing finding if there's any differences. Any more detailed stuff I'd say you need to measure for.

Under construction: the Larch theater
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post #1297 of 1302 Old 09-04-2014, 08:19 AM - Thread Starter
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Thank you both for the information. I will give those suggestions a try the next time I am down there while hopefully finishing off the back wall.
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post #1298 of 1302 Old 10-06-2014, 05:19 AM - Thread Starter
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Minor update - This weekend I found a few moments to finish my back wall insulation and plastic. I also added four of the vertical green panels that I had complete but just sitting around.

Pics showing the 4 mil plastic stapled over the 6" of knauf insulation.






And now with the four new green panels added.






And a new overview shot of the back of the theater.


I still have two green panels to install on the sides and then I will be ready to start making some new panels to fit between all of these. Slow progress but it's still progress I guess...
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post #1299 of 1302 Old 10-06-2014, 07:59 AM
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Thumbs up

Looks very professional.

Under construction: the Larch theater
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post #1300 of 1302 Old 10-06-2014, 08:12 AM
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Vanice,

Looking good - can't wait to see it with the final panels in place!

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Check out a video of my theater here
CuznEddy Cinema
Officially Hanesamatized on 8/1/09

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post #1301 of 1302 Old 10-06-2014, 10:23 AM - Thread Starter
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Thanks guys. You and me both cuzed, you and me both.
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post #1302 of 1302 Old Yesterday, 12:56 PM
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Hi Vanice, I have been reading through your thread and watching your progress eagerly, as well as "borrowing" construction tips along the way. I see that you and I are both following Bryan Pape's acoustical strategies.

I am stumped though on my soffit, as I have the similar problem as you had for sectioning off the soffit to box in the HVAC duct and allow the rest of the soffit to be open for wire runs and recessed lights.

I can see how you constructed the HVAC boots and plan to follow that idea. How did you finish off from the HVAC boots back to where the HVAC duct enters the room? Do you have any closeup photos? Thanks for any more detail you can provide!!!
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