Round Rigid F/G Pipe Insulation used as Tube Bass Traps?

Discussion in 'Studio Construction & Acoustics Forum' started by George3, Dec 10, 2003.

  1. George3

    George3 Guest

    Hi,
    Does anyone have experience using 10" diameter, by 1" or 2" thick, by 36" in length, pre-formed round fiberglass pipe insulation as corner bass traps? If so, how do they compare with 2" thick #705 rigid fiberglass panels in a "triangular-style" corner trap of roughly the same diameter? (All comments welcome.)
    George3

    [ December 11, 2003, 07:31 AM: Message edited by: George3 ]
  2. Todzilla

    Todzilla

    Joined:
    May 12, 2003
    Likes Received:
    0
    Location:
    Neuse River Watershed
    Home page:
    Are you thinking about this approach?

    I think that this newsgroup is a bit cynical regarding cylindrical absorbers.
  3. George3

    George3 Guest

    Todd,
    Yes, that's the one. I'm trying to find a relatively small bass trap in a tight area. Are the cylindrical traps not worth persuing? (I'm a newbie, so forgive me if I make a few "faux pas")
    George3
  4. Ethan Winer

    Ethan Winer

    Joined:
    Mar 19, 2001
    Likes Received:
    0
    Location:
    New Milford, CT USA
    Home page:
    George,

    There's nothing inherently wrong with a tube shape, especially if you put it in a corner. But there's nothing special about that shape either. A flat panel of rigid fiberglass that's thicker and denser than pipe insulation, and placed straddling the corners, will probably do a better job.

    --Ethan
  5. George3

    George3 Guest

    Ethan,
    I agree. However, my window is 10" from the corner, and I only can do the trap in one corner of the room. Can't get a 2x4 panel across this corner, or I'll cover the window. Problem is I need a lot of bass absorption for this 20'x20'x20' room. Nice, eh. (Kidding, of course.)
    George
  6. Ethan Winer

    Ethan Winer

    Joined:
    Mar 19, 2001
    Likes Received:
    0
    Location:
    New Milford, CT USA
    Home page:
    George,

    > my window is 10" from the corner ... Can't get a 2x4 panel across this corner <

    Sure you can! It doesn't have to be at exactly a 45 degree angle to work well. Ten inches should be enough to do a fine job. You could also cut a two foot wide panel to be narrower, but I'm sure you'll do better to leave it the full width so you have more material, and just adjust the angle so it impinges only ten inches on that side.

    --Ethan
  7. George3

    George3 Guest

    Ethan,
    I never thought of that. Forgive my 1-dimensional thinking. Sure, I don't need to maintain a 45 degree angle. With only 1 corner in a 20' cubed room, what else can I do for bass control? Would a 2x4 or larger panel trap immediately adjacent to the 30 degree corner trap work for bass, or not?
    George
  8. Ethan Winer

    Ethan Winer

    Joined:
    Mar 19, 2001
    Likes Received:
    0
    Location:
    New Milford, CT USA
    Home page:
    George,

    > With only 1 corner in a 20' cubed room, what else can I do for bass control? <

    Don't forget the ceiling corners!

    --Ethan
  9. George3

    George3 Guest

    < < Don't forget the ceiling corners! > >

    Ethan,
    Ah, yes. Good point. Thanks.
    George
  10. George3

    George3 Guest

    OK,
    Anyone else have anything to add? I'm looking for bass trap ideas; not necessarily with tube traps. Please, all comments are welcomed. Thanks.
    George3
  11. Amped

    Amped Guest

    Im using 2" 703 from floor to ceiling in all four corners, it makes an incredible difference. Since my room has vaulted ceilings I also installed floating "clouds" in the apex of the ceiling with the foil backing out for additional absortion which made the room very tight but on the same hand, live. I also have a few panels on the walls.
    HTH
  12. George3

    George3 Guest

    HTH,
    Thanks for the reply. Are your floor-ceiling 703's 8' high, or higher? Problem is my ceiling is 20' high. Do you put the panels against the corner "square" or on a diagonal between the walls? When you put the foil side towards the room, does that increase the bass absorption or decreases the bass absorption? I'm not sure how the facing should be. I'm thinking of using 2" #705-FRK panels & building panel traps. Your other wall panels are 2" thick also, I presume?
    George3
  13. jazzman_in_pa

    jazzman_in_pa

    Joined:
    May 12, 2003
    Likes Received:
    0
    Location:
    Philadelphia
    Home page:
    That's not a problem, that's a luxury.

    Foil towards the room gives better low frequency absorption.

    Angling across the corners is good because it puts more air behind the panel and absorbs more.

    Lee
  14. George3

    George3 Guest

    Lee,
    How about panel traps (the kind Ethan designed) on the rear walls... instead of diagonal corner traps. My windows are 10" from the corner. A 2x4 panel or two in each corner is about the best I can do. (The kind with a wood frame, 1/4" resonator, 1/2" air space, 2" #705).
    George
  15. jazzman_in_pa

    jazzman_in_pa

    Joined:
    May 12, 2003
    Likes Received:
    0
    Location:
    Philadelphia
    Home page:
    Like Ethan said, you can put one side of a 703 or 705-based trap at the edge of the window 10" from the corner, and the other side wherever it hits on the adjacent wall. Or just build the wood panel trap and mount it flat on the adjacent wall. It's your call.
  16. George3

    George3 Guest

    Jazz_man:
    I guess my question really was... which is the better performing method.
    Thanks.
    George
  17. Amped

    Amped Guest

    Id corner trap the entire 20', try one panel with the foil out the other in, on top of each other on the diagonal. There really is no "better perfoming method", I depends on how your room reacts to certain treatment procedures. Trial and error will get you where you want to be,,,,,,, eventually. For me, the clouds are what really made the difference.
  18. jazzman_in_pa

    jazzman_in_pa

    Joined:
    May 12, 2003
    Likes Received:
    0
    Location:
    Philadelphia
    Home page:
    HTH, were those clouds 2" 703 FRK? How much air between the back and the ceiling?

    George, like Amped indicated, what's better depends on the room, and he gave you some good advice.

    An acoustician would first measure your room's current response, then make a recommendation for acoustic treatment based on the measurements he gets, but also dependent on your budget.

    What's more appropriate? Depends. The wood panel will reflect more highs and potentially absorb more lower bass in a region centered around a certain frequency based on the depth of the air cavity behind the panel and the density of the panel itself. The 703 or 705's absorption coefficients can be looked up on their website, or in the link Ethan has kindly provided on the main forum page. Or just go with some of Ethan's Mini-Trips. They stopped making wood panel traps because the Mini-Traps are so cost-effective, easy to mount, and don't screw at all with the coincidence of the wall. (And no, I'm not being paid to say that.)

    Lee

    [ December 14, 2003, 06:24 PM: Message edited by: jazzman_in_pa ]
  19. Amped

    Amped Guest

    Id corner trap the entire 20', try one panel with the foil out the other in, on top of each other on the diagonal. There really is no "better perfoming method", I depends on how your room reacts to certain treatment procedures. Trial and error will get you where you want to be,,,,,,, eventually. For me, the clouds are what really made the difference.
  20. George3

    George3 Guest

    Lee,
    Regarding your comment:

    << They stopped making wood panel traps because the Mini-Traps are so cost-effective, easy to mount, and don't screw at all with the coincidence of the wall. >>

    If the panels can be mounted on the wall two ways:
    1. Mounted to the wall with screws, or
    2. Hung from the wall with heavy wire
    Does the wall system (drywall, studs, drywall) interact differently with the absorption, as opposed to hanging them on the wall? Seems I would prefer the hanging method due to the simplicity of removal or change.
    George
Similar Threads: Round Rigid
Forum Title Date
Classifieds Have a Powermac 9600 laying around? Friday at 6:22 PM
DIY Pro Audio Forum Watkins Copicat grounding Jun 2, 2014
Mobile Recording Pair of SDC's around £500 for classical recordings? May 3, 2014
Studio Construction & Acoustics Forum New House w/homestudio - rehersal basement (slope in the ground) Apr 11, 2014

Share This Page