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French (glass) doors, sound proofing
French (glass) doors, sound proofing
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Old 8th July 2019, 07:05 AM   #1
hollowboy is offline hollowboy  Australia
diyAudio Member
Join Date: Jul 2007
Location: 'straya
Default French (glass) doors, sound proofing


A couple of psychologists I know are taking a 2 year commercial lease for their work. I'm helping with setup, and have been asked how to stop sound (conversations) leaking between the rooms.

There are french doors in the wall between the two consulting rooms, and I assume that's how most sound will leak through.

They shouldn't be expecting miracles - I've explained that sound conditioning is easy, sound proofing is hard. Also, what I can do is quite constrained:

- nothing irreversible / marring / ugly.
- I should probably leave the french doors capable of opening (this may be a legal requirement / fire safety issue).

I was considering:

(a) sealing the airgaps around the doors
(b) deadening the glass
(c) hanging a curtain in front - mostly to hide (a) and (b)

Sealing the airgaps seems like a job for weatherstrip foam.

Deadening the glass - tips? I was thinking of using double sided tape to attach a layer of something-or-other.

Is there anything obvious I'm missing?
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Old 8th July 2019, 12:25 PM   #2
mushroommunk is offline mushroommunk  United States
diyAudio Member
Join Date: Sep 2015
Location: Auburn Hills, Michigan
Replace the french doors with something denser that isn't glass. The thicker the better. If you can get pictures someone may be able to give more specific help.

For how limited you are you're on the right track. If you do hang curtains you want them as thick/dense as possible to help.

To stop conversations between rooms you also need to consider air ducts as a possible transfer space. Another thing that you can do which won't "stop" the conversation transmission but may mask it is to add white noise generators. We have those at my work to cover the noise and it's a noticeable difference between when they're running and when they aren't.

If you can't replace the door then attaching MLV and then going across the entire doorway with the densest curtains I could find would be my approach. Don't expect miracles obviously which you seem aware of.

One other thing, there's a gap at the bottom of the door probably. Depending on the HVAC setup in the building this may be required and expected for proper air flow. You might not be able to block that without needing to maybe add window fans or something. I'm speaking from a US building standpoint here but the possibility stands elsewhere.
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