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How to identify acoustic foam

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  • How to identify acoustic foam

    I just picked up some charcoal eggshell foam about 2"- 2.5" thick. It appears to be open cell, and is unlike other "common" types of foam, such as mattress covers, etc.

    Is there any way of determining if it is acoustic foam?
    http://www.paulzerra.com/

    Here is a Blues tune I do w/my trio to warm up:

    https://www.box.com/s/43da5e4ca6432d021eb8

    Music teacher and piano player.

  • #2
    I just picked up some charcoal eggshell foam about 2"- 2.5" thick. It appears to be open cell, and is unlike other "common" types of foam, such as mattress covers, etc.

    Is there any way of determining if it is acoustic foam?
    All foam is "acoustic," just some is better than others. Play some music at it and listen to what comes back. Then try to light a piece with a match. If it burns easily, you don't want to use it in a home that's insured.
    --
    "Today's production equipment is IT-based and cannot be operated without a passing knowledge of computing, although it seems that it can be operated without a passing knowledge of audio." - John Watkinson, Resolution Magazine, October 2006
    Drop by http://mikeriversaudio.wordpress.com now and then

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    • #3


      Is there any way of determining if it is acoustic foam?


      Look at the price tag. If it looks ridiculously expensive...IT'S ACOUSTIC FOAM!!
      Elson TrinidadSinger, Songwriter, Keyboardist, BassistElson and the Soul BarkadaWeb: www.elsongs.comMySpace: www.myspace.com/elsongsFacebook: Facebook PageTwitter: twitter.com/elsongs

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      • #4
        Is there any way of determining if it is acoustic foam?


        Yes. The best way is to "talk into" it and listen for what comes back. If it sounds like you're talking into a total void, it's probably acoustic foam. It helps to do this with known-good foam a few times first, so you know what good foam sounds like. Cheap foam reflects more back at you than good foam.

        --Ethan
        The acoustic treatment experts
        Buy my DVD

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        • #5
          I would track down who is the company and see if they have any lab numbers on it. If not then I would not even think about using it.

          Glenn
          Glenn Kuras - GIK Acoustics
          770 986 2789 (US)
          +44 (0) 20 7558 8976 (UK)
          www.GIKAcoustics.com
          GIK Now Offering Room Kits

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          • #6
            Yes. The best way is to "talk into" it and listen for what comes back. If it sounds like you're talking into a total void, it's probably acoustic foam. It helps to do this with known-good foam a few times first, so you know what good foam sounds like. Cheap foam reflects more back at you than good foam.

            --Ethan


            Another good answer!

            Also, try this (if you can afford it):

            Take a fist sized piece, squeeze it and put it in water. Take it out and squeeze it again. If a ****************load of water comes out (similar but not as much as a sponge), it's probably open cell foam.

            If you got your sample from a life jacket, throw the jacket away!

            Terry D.
            Telling Stories releases 2nd CD, see our WEBSITE! Please check out my GROUPIE STORY and Tales from the Road.

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