Control room window

I have read that at least one of the two pieces of glass in my new control room / studio window is to be angled at least 5 degrees. I have been told that the main reason for angling the glass is to prevent standing waves within the glass cavity and also to prevent reflection of the room lights from interferring with vision into the studio. However, the diagram that I have seen shows that the "studio side only" of the window has the glass angled. It shows the control room side being plumb with the wall. I want to do this right and need to know the correct construction of a 32" high by 6' wide double glass window 22" wide. At this point, I have been planning on constructing the window out of 3/4" solid core mahogany plywood with both pieces of glass seated in some kind of soft rubber gasket (which I haven't found yet) and both pieces angled at aprox. 5 degrees each in an upside down triangle fashion( \/ ) so that room light reflection is angled toward the floor. Does this seam like an acceptable method of building the window without running into any frequency cancellation problems or doesn't it really matter if the window is angled or straight? Any help will be appreciated. Thanks, PAULIII

Windows are angle do control/direct reflections. both sound and light. There is no need to angle the glass for isolation purposes. Andre

In fact, angling the glasses, while it will improve glare in the rooms and will also redirect acoustic reflections and help minimise flutter echo between any hard surfaces that may be opposed to the window (as well as those that cause speaker interference off the front window) the angle reduces the effective air distance between panes of the window, reducing the isolation at lower frequencies. In your case, if you have 22" between panes, you can get away with losing a few inches of that space for the sake of the positive things I mentioned (and that Andre also mentioned) - if you only had 6-12 inches of space between the glasses, I'd start thinking of other ways to control the glare/acoustic reflections, because you would be giving up about half your air gap - that would cause too much loss of isolation with the narrower gap. Since you have plenty of depth, I'd go ahead and tilt the glasses... Steve

Thanks for the info. I'm going to go ahead and angle both of them about 5 degrees each pointing downward. Thanks again. PAULIII