Accoustic Panels Home Made

Discussion in 'Pro Audio' started by Julien BH, Apr 1, 2008.

  1. Julien BH

    Julien BH Guest

    Hi everyone,

    I started this weekend making 6 accoustic panels from two chunks of
    1/2 inch high density panels. I separated them with 1 inch of air
    using a frame of wood around. So it's panel / air / panel.

    Next week I'll cover them with some kind of cloth. But I already tried
    them in my 10x12 room and I must say I am quite impressed. For about
    35$ and 2 hours I made my room sound way better. No more of that
    metallic sounding reverb.

    I made some test sounds with them, and without them and recorded them.
    I then shipped them to my friends without them knowing which one was
    treated. They all were spot on. So I guess it's all good. I only put 4
    of them for the record, so 6 should be even better.

    Quick question: For reflection taming, am I better to put them in the
    corners of the room or on the walls? I suppose ceiling would be
    important too, but I haven't found a way to put them there. Thanks
    everyone.

    Me very happy.

    p.s.: I'll try to upload the 2 mp3s on a website for your to hear.
     
    Julien BH, Apr 1, 2008
    #1
    1. Advertisements

  2. Julien BH

    Julien BH Guest

    Haha I'm sure you don't want to see that as of now. It's really "home
    made". I'll try to make them look better before I post any pictures.
    Give me a week or so and I should be able to show you that. But as
    your nickname says: Sound has priority.

    Where could I upload my pics easily?
     
    Julien BH, Apr 1, 2008
    #2
    1. Advertisements

  3. Julien BH

    Julien BH Guest

    Julien BH, Apr 1, 2008
    #3
  4. Julien BH

    Julien BH Guest

    Julien BH, Apr 1, 2008
    #4
  5. Julien BH

    Jos Geluk Guest

    Julien BH schreef:
    How big are they (roughly)?

    Jos.
     
    Jos Geluk, Apr 1, 2008
    #5
  6. Julien BH

    Julien BH Guest

    about 15 inches by 24 inches.
     
    Julien BH, Apr 1, 2008
    #6
  7. Julien BH

    jowillie Guest

    jowillie, Apr 2, 2008
    #7
  8. Julien BH

    Powell Guest

    "Julien BH" wrote
    Your room has approx. 592 sq ft of surface area. Your four
    completed devices have 10 sq ft of surface area. So you are
    treating 1.7% of the room's surface area, which isn't very much.
    You said that they made your room sound and measure "way
    better." How has the room's measured performance changed
    (quantified results)? "No more of that metallic sounding reverb,"
    I doubt your claim. I think you have an over-imaginative ("quite
    impressed") mind. ;-)
     
    Powell, Apr 2, 2008
    #8
  9. Julien BH

    Powell Guest

    "Julien BH" wrote
    Depends. Are you using the sweet spot for recording or monitoring
    (editing)?

    mp3 isn't valuable for accuracy comparisons. Graphics would
    be more helpful.
     
    Powell, Apr 2, 2008
    #9
  10. Julien BH

    Julien BH Guest

    In fact since my room is not "full" :
    ______
    | |
    | | __
    | |
    |________|

    I'm covering about 8% and about 10-12% when I'll have all 6 panels.
    My room is smaller than I thought ;)
     
    Julien BH, Apr 2, 2008
    #10
  11. Julien BH

    Julien BH Guest

    I'll make that then.
    A clap of hands should be okay?
     
    Julien BH, Apr 2, 2008
    #11
  12. Julien BH

    Julien BH Guest

    No I made my friend listen to some clapping tests and they found the
    original room was more metallic and had more flutter echoes / reverb.
    It's not my imagination. I'll prove it to you soon ;)
     
    Julien BH, Apr 2, 2008
    #12
  13. Julien BH

    Powell Guest

    "Julien BH" wrote
    Well, this configuration (room layout) is better than a
    symmetrical counterpart. The additional wall-wall junctures
    (saw teeth) adds additional reverberations over a four wall
    room. These type of room boundaries, like tetrahedron (room
    corners) , will can play havoc (dB multiplier) when recording
    or listening/editing. Base traps (wall-wall/ wall-ceiling) could
    fix your reverberation issues.

    Not to be overly cheap but how about using a acoustic blanket
    (hung or rolled up) in the junctures?
     
    Powell, Apr 2, 2008
    #13
  14. Julien BH

    Powell Guest

    "Julien BH" wrote
    And the answer is?

    Well, the place to start is with measurement. You need to set-up
    your speakers in a few different potential configurations (if room
    for editing). Record a frequency sweep from your near field
    editing position (chair). I prefer the Stereophile's Test CD 2, 1/3
    octave warble tones but there are may alternatives free choices.
    A high-end microphone is not required.

    If the room is for recording the analytic room measurement is
    more problematic.

    Then in your sound edition software run a spectrum analysis
    of the sweep using something like the Blackman-Harris
    algorithm using sample sizes of 2,048. Screen capture the
    resulting graph or take a picture of the screen with digital
    camera and post results
     
    Powell, Apr 2, 2008
    #14
  15. Julien BH

    Powell Guest

    Hehehe... oh-right! Like you would know, mr. No Experience.
     
    Powell, Apr 2, 2008
    #15
  16. Julien BH

    Powell Guest

    "Soundhaspriority" wrote
    Couple of years ago I built three portable 3' x 7' acoustic
    panels for couple of hundred dollars, which have worked
    well for small-scale EFP. But system is not durable or
    portable enough for general usage.
     
    Powell, Apr 2, 2008
    #16
  17. Julien BH

    Julien BH Guest

    Because my door is right there. I don't want to fall in a blanket when
    I open a door.
    Also my ascii art didn't get out well in the post. I'll put a picture
    in the original link given.
     
    Julien BH, Apr 2, 2008
    #17
  18. Julien BH

    Julien BH Guest

    When you'll hear them, you'll understand
     
    Julien BH, Apr 2, 2008
    #18
  19. Julien BH

    Julien BH Guest

    Julien BH, Apr 3, 2008
    #19
  20. Julien BH

    Julien BH Guest

    Julien BH, Apr 3, 2008
    #20
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.