John Sayers' Recording Studio Design Forum Archive

Hello!

I'm getting ready to treat the ceiling of my control room over the mix position. About 60% of the walls are covered in 2" and 3" 6 pcf fabric covered compressed fiberglass board... The back wall is treated with a combination of absorbs ion and diffusion.

The room is sounding really great, except a little boomy and unfocused about 250hz and below. The ceiling is currently untreated and untextured (one layer of 5/8s gyps over 3/4 ply). I'm thinking about building a fabric covered acoustic panel and hanging it over the mix position. The panel would be 2 inch, 6 pcf compressed fiberglass board 4x8. I would glue five 2x2 q-fusors by auralex to the surface of the fiberglass board, build a wooden frame, and cover with fabric, suspend from the ceiling...

that's the concept, I'm not sure how much this will help with the boomyness. Any suggestions or ideas???

thanks!

andrew

Andrew,

> The room is sounding really great, except a little boomy and unfocused about 250hz and below. <

A cloud over the mix position is useful, but to target problems below 250 Hz you should be looking at rigid fiberglass type bass traps straddling as many corners as possible.

--Ethan

HEllo Ethan,

In reference to rigid fiber glass traps in the corners, I've already got them in place:)

As far as the cloud is concerned, would you waste your time with the diffusion attached to the face of the riid fiberglass board? Does it make a difference if the cloud is at an angle? Any info or links for cloud construction would be extremely uselful!

thank you:)

andrew

There's lots of ways to build clouds.

Here's two:

http://www.bobgolds.com/AbsorberMount/home.htm <- plastic stucco fastiners (add bag)
http://www.recording.org/ftopict-26889.html <- David French's aluminum guttering material

then there's
- false ceilings
- contracarpet
- Newell's 4' hangers
- one end open 10'x1'x1' HVAC ducts full of absorbtion
- etc

Should I skip the diffusors and just use rigid fiber glass board???

aschatzb:

What are the dimensions of the room (length, width, height)?

Any pictures?