Glass

Posted: Thu May 22, 2008 8:43 am

Hi,

I wish to know about how to apply the Glass in between Control room and Vocal Room?

I just apply those (about 5mm) Glass on both side (Straight) and in between the two galsses the space is about 2ft.

Am i do the write decision?Do the glasses need to be slanting?

Thanks

Posted: Thu May 22, 2008 1:08 pm

I love your English. Can I ask what your first language is?
Anyways, http://www.acousticalsurfaces.com/acoustic_windows/soundstop-window.htm
Has a fair bit of info in it. Seems your glass is too thin though.

Posted: Thu May 22, 2008 1:32 pm

ray1018 wrote:

Am i do the write decision?Do the glasses need to be slanting? Thanks

That's the $25 question. On one hand acoustically there are some benefits in terms of reducing standing waves within cavity (allegedly), but even here there's argument for and against. Slanting the glass also helps reduce glare. There are plenty of acousticians (like the one I used to work for) who would tell you that there are no acoustic benefits at all, that it actually makes some problems worse, and that if glare is the problem, then a lighting change is in the solution. I have a document about all of that somewhere around here...

That glass does seem thin, too...

Frank

Posted: Thu May 22, 2008 4:42 pm

Weasel9992 wrote:

[That's the $25 question. On one hand acoustically there are some benefits in terms of reducing standing waves within cavity (allegedly), but even here there's argument for and against."

Forget arguments - saying that suggests that the real answer isn't known. It's a matter of the laws of physics - and that argument (in favor of doing it) is a lot of bunk.

First of all - splaying walls - or glass - or anything else for that matter - will not stop standing weaves from forming. What they can do is minimize flutter echo - and that only occurs between the 2 spaces - and no one is in there to hear it if it did exist.

Next - it decreases your total isolation because it takes away from the total air space - and brings the mass closer together.

HOWEVER - I think it looks neat - and if the glass is sized properly - you can still acheive the isolation you have in your wall - which is all that really matters - more than what you have in your wall will gain you nothing.

Quote:

Slanting the glass also helps reduce glare. There are plenty of acousticians (like the one I used to work for) who would tell you that there are no acoustic benefits at all, that it actually makes some problems worse, and that if glare is the problem, then a lighting change is in the solution. I have a document about all of that somewhere around here...

Although I have never had it create problems in any studio I have constructed and (or) designed) - they are 100% correct that it has no - that's zero - acoustic benefits.

Quote:

That glass does seem thin, too...

That's about a 3/16" thich piece of glass - and it's useless for isolation -

if you have double 5/8" drywall (16mm) on your wall surfaces - then you should have one piece of glass around 12mm and the other should be about 19 mm. The different thicknesses help to stop issues relating to coincidence and common center frequencies.

The glass you're using is a common window glass - and will not get the job done for any real degree of isolation.

Rod

Posted: Thu May 22, 2008 9:33 pm

Greener wrote:

I love your English. Can I ask what your first language is?
Anyways, http://www.acousticalsurfaces.com/acoustic_windows/soundstop-window.htm
Has a fair bit of info in it. Seems your glass is too thin though.

Haa..please,don't laugh on me...i'm still learning,OK?
Wow..thanks for the useful Link,fantastic!!will look into it,Thanks again!

Posted: Fri May 23, 2008 4:14 am

Rod Gervais wrote:

Forget arguments - saying that suggests that the real answer isn't known. It's a matter of the laws of physics - and that argument (in favor of doing it) is a lot of bunk.

Quote:

Slanting the glass also helps reduce glare. There are plenty of acousticians (like the one I used to work for) who would tell you that there are no acoustic benefits at all, that it actually makes some problems worse, and that if glare is the problem, then a lighting change is in the solution. I have a document about all of that somewhere around here...

Although I have never had it create problems in any studio I have constructed and (or) designed) - they are 100% correct that it has no - that's zero - acoustic benefits.

...and that is exactly what Jim (the guy I worked for) used to say.

Frank

Posted: Fri May 23, 2008 6:45 am

Weasel9992 wrote:

...and that is exactly what Jim (the guy I worked for) used to say.

Frank -

and he was right......... sounds like a smart man.

Sincerely,

Rod

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