OT: Question on Lesson Studios

[Ron Nossaman]

>  If the other factors in the wall
>are done properly and the noise reduction reaches 90%, splitting the plates
>has far less of an effect on the overall noise reduction and is not
>important.

Keith,
Good, I thought that's what that one was about.


>By the same token, if the soundboard rib structure etc., is
>designed to achieve the desired stiffness, the bridge stiffness becomes a
>non factor. I hope that's what you guys meant, thanks for your polite
>response.

Well, not exactly a non factor, but beyond a certain minimal stiffness, 
making the bridge stiffer doesn't do much but add mass, which can itself 
have an affect. And bridge stiffness requirements are to a large extent, 
determined by the rib scale, but I don't see a tie in as far as gluing the 
bridge to the board in a "crowned condition" or not, and where it connects 
with the room acoustics thing. That's where I'm confused.


Ron N