Glass window between control room / live room

  • Thread starter Thread starter djgc
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witzendoz said:
Regardless of wether the angle helps with the sound isolation, I also thought that angling the glass helps with the actual room acoustic as you don't have a large reflective surface parallel to the wall. The angle of the glass will act as a defuser.

Cheers
Alan.
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Alan,

Myth......... that is unless you have one hell of a tilt in your window......

the angling of walls help to deal with flutter echo and (perhaps) first reflections (if they are done right) - by done right I mean that the total of the 2 surfaces need to have a minimum total of 12 degrees of variance between them.

So for a window to correct for a back wall that would be parallel to the window if the window were installed plumb - that would mean the window would have to be installed 12 degrees out of plumb.......

For a window opening 4' in height that would translate to the window pane having to tilt into the room 10 3/16" from top to bottom........ 7 5/8" for a 3' tall window...

that is some serious tilt - it would require 2x12 walls for a 4' window and at least 2x8 walls for a 3' tall window - and (to be totally honest with you) I have never in over 33 years in this industry ever seen a window in a studio installed with that large a tilt in the glass.........

If this was something you were really seriously concerned with - it would be much easier to deal with a the back wall with a combinations of absorption and diffusion.

Rod
 
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Oh well Mine has been built for years, it works for me, and that was all I was saying in my 1st post, it was an example of how well it worked.

I am not saying that the glass has to be at an angle, but almost every studio I have been in or seen photos of have angled glass, I have read (acoustics 101 site) that if it is less than 8 deg then you are wasting your time, well mine is at about 8 deg.

I am not saying you are wrong, but how is it that almost every recording studio in the world has glass at an angle?

Cheers
Alan.
 
witzendoz said:
Oh well Mine has been built for years, it works for me, and that was all I was saying in my 1st post, it was an example of how well it worked.

I am not saying that the glass has to be at an angle, but almost every studio I have been in or seen photos of have angled glass, I have read (acoustics 101 site) that if it is less than 8 deg then you are wasting your time, well mine is at about 8 deg.

I am not saying you are wrong, but how is it that almost every recording studio in the world has glass at an angle?

Cheers
Alan.
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Alan,

you assume to much - I am in no way saying that it is wrong to do this.......

We are speaking here strictly about science - the law of physics - which has nothing in the world to do with anything other than that subject.

I am a published author in the field - in my book I provide details for sloped glass windows as well as parallel.

I explain the actual physics involved - and then suggest that they do it with sloped glass because it is just too cool looking to do it any other way.... and because (as I noted in an earlier post I made in this thread) once you have enough mass in one side of the assembly, coupled with a slight difference in thickness to handle coincidence in the other - the added mass makes up for the small loss in isolation.........

Every recording studio I have ever designed had sloping glass in it - and every one I design from this point forward (for as long as I am able to design studios) will have sloped glass in it......

I am not saying that anyone is wrong for putting glass in a studio out of plumb........ however let's at least do it for the right (hence "real") reasons - acoustic myths like this need to be proven for what they are....... they don't even reach the level of quasi-science.......
 
Rod, It's all interesting, I did not really have an opinion either way, but it does look cool to have angled glass ha ha. All the studio books and articles I have read always have angled glass so thats how I built mine.

Buy the way, a few years ago I was involved in designing a community radio station, I specified double glass in all the windows but to save space and money we used off the shelf commercial made double glazed windows. As we were only trying to keep out people taking in the next studio or lounge, not a band playing, it works fine.

Thanks for your views.

Alan.
 
So should a vacuum be created between the panes? How do you stop the sound coming through?
 
So should a vacuum be created between the panes?
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No. That is impossible with de-coupled frames. In fact, even if you used a single welded frame, the more vacume you apply, the more probability of glass fracture...unless of course the glass is a calculated thickness..which I doubt you could afford.

How do you stop the sound coming through?
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By virtue of Physics. MASS.
 
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