Archived from groups: rec.audio.pro (
More info?)
Steve King <steve@45steveking57.net> wrote:
> "Richard Gecko" <geck@nomac.com> wrote in message
> news:geck-573AAB.18230714022005@newssvr11-ext.news.prodigy.com...
>>I have a few interior windows of the old, double-hung type. They
>> transmit a lot of sound from the outside into a home studio and living
>> room. In short, the dog next door and slamming car doors are intrusive.
>>
>> Instead of installing expensive double-glazed storm windows, I thought
>> I'd try to attach some glass over the window from the inside. I never
>> open these windows, so no problem there. Perhaps just a piece of glass I
>> could lay over the window and affix with mirror-type fittings.
>>
>> I'd appreciate any information about the best glass for reducing sound,
>> or any other material that might even do a better job. Websites articles
>> or any recommendations welcome.
>>
>> (to the list, please)
>>
>> RG
> You will have little success with the approach you suggest.
> Multiple-layered pane windows reduce sound transmission by trapping air
> between the panes. That means that one needs an air-tight seal, when
> glazing in the second or additional panes. In addition, old double hung
> sash windows are typically very leaky around the frame. So, even if you do
> glaze the new glass in a fashion to achieve an air-tight seal, a significant
> amount of sound will leak around the edges of the frame. With all of that
> said, you may be able to achieve ... some ... noise transmission reduction
> if you install an additional glass pane. And, a standard thickness pane as
> large as a double hung window will be pretty useless. You'll have to go
> thicker... 1/4 inch at least. You must approach it as you would install a
> weather proof window. That means well caulked trim strips all around on
> both sides of the glass, closed-cell foam weather stripping on each side of
> the glass all around, and solid rubber spacers for the glass to rest on to
> keep the glass from touching the frame. Unfortunately, you will not know
> ahead of time how successful this project will be until you do it.
> I had a similar yet easier problem to solve with my basement studio. There
> are two metal framed casement windows in the poured concrete foundation very
> close to my recording position. I removed the casement windows entirely. I
> added a wood frame within the metal frame caulking those framing pieces
> thoroughly. Within that new frame I installed a double pane system
> consisting of one piece of 1/4 inch glass and another pane of 3/8 inch
> Lexan. Both pieces are floated on solid rubber spacers and encased around
> the edges in closed cell foam weather stripping. As soon as I did this, my
> neighbors dogs, aircraft, and the other usual suburban noise went away. As
> long as no one mows my back yard, while I am recording, I'm good to go.
> Since I mow my own yard, even that's not a problem.
> Another thought, unfortunately not a very encouraging one... if your house
> does not have really substantial construction with fairly dense insulation
> within the exterior walls, a lot of the exterior noise you hear will come
> right through the walls negating the energy and expense you put into the
> windows. Hate to be so negative.
> Good luck. Let us know how it turns out.
What if he were to install 1/4 inch Lexan over the frames, sealed airtight,
on a gasket? Then he gets some mass, plus some bonus security.
Rob R.
9udnc7sobwNC4_fRVn-qg@comcast.com...
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