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-   -   does sound absorbtion have to be directly on the wall? (https://www.gearslutz.com/board/studio-building-acoustics/1308768-does-sound-absorbtion-have-directly-wall.html)

gearstudent 2nd May 2020 12:39 AM

does sound absorbtion have to be directly on the wall?
 
Hello,

Typically people glue or otherwise fasten sheets of acoustic foam onto walls to reduce echo.

I was wondering: if you had the foam on mobile panels that were a few inches from the wall, would that still work? I was thinking of using room dividers and putting foam on them:

https://www.amazon.com/SQUARE-FURNIT...376213&sr=8-11

It seems like you would also get some non-scientific diffusion, because the panels from the room dividers would reflect the non-absorbed sound at angles rather than directly back. Maybe perhaps, they also could serve as a bit of a bass trap by trapping the bass in the airspace between the room dividers and the wall.

But I don't know if you lose a lot of absorbtion efficiency if they are "floating" away from the wall like this. And studio acoustics is a complex topic in general. So I'm wondering what the general concerns might be for this wacky idea.

Thanks!

johannburkard 2nd May 2020 01:16 PM

You can try to simulate what you have in mind at Acoustic Modelling: http://www.acousticmodelling.com/

avare 2nd May 2020 03:41 PM

Quote:

Originally Posted by gearstudent (Post 14703178)
Hello,

Typically people glue or otherwise fasten sheets of acoustic foam onto walls to reduce echo.

I was wondering: if you had the foam on mobile panels that were a few inches from the wall, would that still work? I was thinking of using room dividers and putting foam on them:

https://www.amazon.com/SQUARE-FURNIT...376213&sr=8-11

It seems like you would also get some non-scientific diffusion, because the panels from the room dividers would reflect the non-absorbed sound at angles rather than directly back. Maybe perhaps, they also could serve as a bit of a bass trap by trapping the bass in the airspace between the room dividers and the wall.

But I don't know if you lose a lot of absorbtion efficiency if they are "floating" away from the wall like this. And studio acoustics is a complex topic in general. So I'm wondering what the general concerns might be for this wacky idea.

Thanks!

You have so many misconceptions. Read the chapter Absorption in MHoA.