Tweakers' Asylum

Do these type of Fiberglass Sleeves

75.68.119.187

ArdRi

function well as bass trap type devices? I thought I saw a DIY using these... If the paper skin can be removed and i can get them in 12" diameter then cap the ends and wrap in acoustic fabric what will I have?

Fiberglass Pipe sleeves (Open in New Window)

Follow Ups:

yes, but a few things to be aware of - troporobo 19:14:22 09/27/08 (2)
I have built traps using the Teres recipe below and learned a few things in the process. First of all, they work, absolutely. Read the Teres site and Jon Risch's pages and you will have no trouble putting some together

If you are going the DIY route you can perhaps afford more of them, which is good. Stacking two 1 meter sections to reach (nearly) floor to ceiling rather than only one section to half height made a dramatic difference in the front corners of my room.

Consider a bigger diameter though. I have a suspicion that 12" may not be as effective as a bigger tube. The density of the fiberglass matters a lot, so you may need to experiment (if possible). One way to do that is to stuff half your tubes with fiberglass batts and leave the other half empty. That way you get a broader spectrum of absorption.

Caution: these are all amateur theories, YMMV!
- Question - eis 20:58:43 09/27/08 (1)
  Since you used this recipe; I'm not sure what "attach plastic film to the trap so that it covers half of the circumference of the trap" means. The pictures don't tell the whole story. I'm assuming half the tube, the full length, only gets covered? If so the plastic (assuming again) goes towards the room? Sorry... I'm a complete novice.
  
  Thanks,
  eis
  - plastic film - troporobo 21:05:54 09/27/08 (0)
    The plastic film is there to adjust the amount of reflection of HF only. The compressed fiberglass is a good absorber at high frequencies so people like to be able to tune the the amount of reflection vs. absorption.
    
    The recipe calls for half the cylinder to be covered, top to bottom vertically. Then the cylinder can be rotated to vary the amount of film facing the room vs. facing the corner
RE: Do these type of Fiberglass Sleeves - rwiley 18:45:40 09/27/08 (0)
Here
- http://www.teresaudio.com/haven/traps/traps.html (Open in New Window)

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