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Old 02-17-12, 04:16 AM   #11
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Re: Chamber of Dreams => How it was made...


Quote:
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Definitely interested - been following along so far!
Ok. I was just wondering, because my room is already finished

I have forgotten an important piece of the puzzle. The reason for the ceiling. I had someone do a RT60-measurement and he drafted a plan and suggested a ceiling with slabs that could absorb frequencies from 250Hz and up.

Test setup
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Measurement in progress. Blue in that chart is not good
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Result. Average reverberation time is almost 3 seconds Target are the red lines...
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But with help of the ceiling, the carpet and the other acoustic measures that would change...




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Old 02-17-12, 05:17 PM   #12
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Re: Chamber of Dreams => How it was made...


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Anybody interested in the rest of the build? I expected questions about the choices we made and why
Still following..Just waiting on the later stages..


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Old 02-18-12, 04:01 PM   #13
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Re: Chamber of Dreams => How it was made...


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Still following..Just waiting on the later stages..
The ceiling was the most important stage of the build. And later on the absorbers and much later on the bass traps. But don't worry, I will continue posting...

You have to wait though, because tomorrow I'm away and now I have to go to sleep It's around 23.00 o'clock here at the moment and I have to get up early. But Monday I'm back. See you all then!



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Old 02-19-12, 04:46 PM   #14
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Re: Chamber of Dreams => How it was made...


For the lighting of the room we chose 3 lights each side. We found some that were easy to install in the ceiling tiles. For the back wall it looked like this.

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Next was our biggest challenge, the projection wall. It was gonna be an important acoustic measure and it was supposed be to done very accurate. So we started bij positioning the screen exactly in the middle and at the right height.
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The design was pretty straight forward, bus not easy to construct.
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Every compartment was a separate absorber tuned to a specific frequency. So even behind the screen 3 absorbers would placed. The idea was to integrate the screen into that absorber.



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Old 02-20-12, 12:27 PM   #15
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Now we knew where the screen was going to be, we started with the frame.
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We needed to make sure there was a little open space between the board and the rockwool.
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Filling up the absorbers with rockwool
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With the wooden boards and the Beamax A-velvet in place
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Next activity... "Paint it black"



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Old 02-20-12, 03:27 PM   #16
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Re: Chamber of Dreams => How it was made...


To enhance contrast and picture the whole wall is painted black.

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The end result with the screen in place. Compare this to the picture with original color
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It started to look like a home cinema already...



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Old 02-20-12, 04:15 PM   #17
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Re: Chamber of Dreams => How it was made...


The finished result looks very good, but why the timber panels over the rockwool? Surely this will give you a reflective surface that high frequencies will bounce off!


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Old 02-20-12, 04:30 PM   #18
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Re: Chamber of Dreams => How it was made...


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The finished result looks very good, but why the timber panels over the rockwool? Surely this will give you a reflective surface that high frequencies will bounce off!
Thanks Prof

The timber panels act as a membrane and can flex quite a bit. That is why there has to be a gap between the timber and the rockwool. But you're right that high frequencies will bounce off. The panels are there to handle the low/mid low frequencies (80-250Hz). The ceiling deals with de mid frequencies and above (250Hz-).

Furthermore, a curtain will be used to cover most of the reflective surface when watching a movie or concert. With music the curtain stays closed and therefor covers the whole wall.



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Old 02-20-12, 04:58 PM   #19
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Re: Chamber of Dreams => How it was made...


Hmm..Very interesting!..I look forward to hearing your report on how the end result sounds..


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Old 02-20-12, 05:05 PM   #20
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Re: Chamber of Dreams => How it was made...


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Hmm..Very interesting!..I look forward to hearing your report on how the end result sounds..
I will do that and I can even show RT60-measurements after treatment phase 1 and the end result.



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