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I'm starting a new build. I'll have two walls back to back, separating my control room from my tracking room. The walls will be a minimum of 1' apart at the narrowest point, and spread to about 3' at the widest point. Instead of having a big window and doors, I'd like to use sliding glass doors (one for each wall)--I worked at Masterfonics in Nashville many years ago, and it seems to be a good two-birds/one stone solution.
My question is: if one door has an STC rating of 30, would the two doors together make a total STC of 60? (yes, I do realize that 30+30=60, but sound doesn't always work so simply. . .)
The reason for my query is that I can get doors from "Really Expensive Studio Door Company" that has a total STC rating of 65 for $6k, OR I can get two doors from a company like Andersen that has specs for each door at an STC of 30+ for $2K. . .
T, Doubling the door thickness will not produce twice the STC . Realize that STC ratings start at 125 Hz. and do nothing to estimate the sound transmission reduction below that frequency.
So, you'd go with the more expensive door combo?
T, Without knowing much more about your usage, pressure levels, low-frequency sources, I have no idea. I have many concerns with the design you are using. If you want me to take a more thorough look at your project, fill out the information in this link. Please attach photos to the form. https://acousticfields.com/fre.....-analysis/
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