Building a frameless broadband absorber

In my home studio I found that room treatment was the best upgrade I ever bought. I'm in the process of increasing the number of panels from 13 to 22, and this video shows the construction of one panel.

I use a cheap, quick, simple technique, wrapping the compressed fiberglass in burlap without a frame or mounting hardware. OC703 is rigid enough to be self-supporting, and I can fit two panels snugly between the floor and my 8 foot ceiling.

Please visit the Home Brewed Music blog at http://www.homebrewedmusic.com for more information on building broadband absorber panels like this. You can find a bill of materials and more details on the construction. There are also posts showing the layout of the panels in the room and frequency response measurements for different configurations.

Category:

Howto & Style

Tags:

• recording
• acoustic
• broadband
• absorber
• oc703
• diy
• home
• studio
• room
• treatment
• brewed
• music

[wakena2003]

How do you hang it to the wall?

[homebrewedmusic]

@wakena2003 Oops, sorry I missed this one. I straddle vertical corners with two panels which fit nicely from floor to ceiling. I straddle ceiling to wall coners with eye hooks and twine. I also use eye hooks and twine to suspend panels from the ceiling. Then I lean the rest against the wall so I can move them around if needed.

Fran

[pablitoreptar]

i think your fabric its too thick you should use polyester, if you can blow air easily throu the fabric sound will pass freelly so it improves other wize it reflects mids and highs its just a tip .!!

[homebrewedmusic]

Thanks for visiting. Burlap is a standard covering, it's not a very tight weave and passes air very easily.

Fran

[mikeperaltamusic]

You know what I just realized would be so awesome? A dedicated video showing how your videos sound before and after adding these for treatment, with an explanation of why they change the sound, how, and why that is desirable..

[franguidry]

@zzzxtreme Sorry, I know nothing about Rockwool 80 or the recommendation mentioned below.

Fran

[zzzxtreme]

Rockwool 80 is the recommended one ? is it cheaper than OC703 ?

[jakobole]

@vinylredstudios Ahem - sound travels easily through doors, ceilings etc - think about it. A little glue will have littel to no effect.

[bradhammett1]

@franguidry

The market has moved on since then they found that the fiberglass was having to be 80kg non compressed, with a metal pin holing it in place but then the slab gathers at the bottom of the fabric. So the company that i work for and is in the tender for the new pinewood studio's, have been found a Rockwool 80 work for year's longer and held up.

Brad

[franguidry]

@bradhammett1 Thanks for offering your opinion. I wonder how you developed your expertise? The compressed fiberglass I use is one of the most widely used sound treatment materials available, it's the basis for nearly all the panel absorbers on the market.

Fran

[bradhammett1]

the panel is to hard to not bounce the sound

[franguidry]

@vinylredstudios Thanks for your input. I just tried blowing through the glass and could easily exhale through the fabric, glue, and fiberglass. Since sound is air motion, I believe this demonstrates that you are incorrect, but I'd be interested to get more info.

Fran

[vinylredstudios]

the funny thing about this technique is it defeats the purpose of the trap. when spraying an adhesive like that anywhere on the compressed fiberglass or rockwool, it fills in the poors with glue. thus not allowing the sound to enter into it and being trapped.

[orenas21]

thanks for video