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Sound absorbers

Discussion in 'Home Cinema Building DIY' started by mw3cdj, Feb 9, 2004.

  1. mw3cdj

    mw3cdj
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  2. oaklandraiders

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    Yo

    I'll be gettng some hopefully at the WE.
    I've bought a similar product, it just hasnt got the brand name.
    Its a mass density vinyl - same stuff 1lb per foot

    John
     
  3. mw3cdj

    mw3cdj
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    Hi John,
    Where did you order the stuff from ?? Is there a web site ??
    Can you let me know the results?? I need to do something the sound in my room seems to be over- bright at high volumes, and from what iv'e read this sort of suff would help.
    Any one else??
    Regards,
    Daran.
     
  4. Ian J

    Ian J
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    Custom Audio designs seem to be one of the biggest names in UK and their website here is a huge resource of all things connected with room acoustics.
     
  5. mw3cdj

    mw3cdj
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    Hi Ian ,
    Thanks for the link :smashin: . Some good info there. Looks like i'm going to spend some more cash :rotfl:
    Regards,
    Daran.
    Anyone else using some form of treatment ??
     
  6. Godfather

    Godfather
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    I swear by 2" Studiofoam! You've probably seen my ramblings on the subject elsewhere, but IMHO you really can't go wrong with this stuff. I'm sure there're other effective products out there including plenty of DIY solutions, but for instant night and day improvments I can't recommend Auralex enough.
     
  7. mw3cdj

    mw3cdj
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    Hi Godfather,
    Thanks for your input, and yes i have seen your ramblings elswhere;) .
    I've been looking at studiofoam now for a while now but haven't been convinced about the claims made by some people. So just placed my order for a box of 2" studio foam and i can then make my own mind up. Must be good stuff , i mean all the top recording studios use it :D .
    Ill post my results after iv'e coverd my walls :rotfl: :rotfl:
     
  8. Ian J

    Ian J
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    Anyone going to the Bristol show should look in at Activ Distribution's room as they have just taken over the distribution of Echo Busters Acoustic Room Treatments.

    This stuff seems to have received excellent reviews including the claim that

    The website is at http://www.echobusters.com/page14.html
     
  9. squid

    squid
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    Don't know how much this usualy costs but somone on ebay is selling a full kit of this stuff link
     
  10. oaklandraiders

    oaklandraiders
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    Yo

    I've got the stuff bck and will try a mini experiment later. I'll post as soon as I know. But having seen the thinness I'm sceptical.

    John
     
  11. Godfather

    Godfather
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    Have you done it yet? :)
     
  12. mw3cdj

    mw3cdj
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    I'm doing it , I'm doing it :D . I only have a few hours in the night to experiment with placement and most of the panel's are supported by bits of wood at the moment, but I'll tel you what the difference in sound is phe·nom·e·nal . There is no harshness yet the sound is brighter , separation is more defined , higher levels of detail , tighter more controlled sound all together . If all that's not enough i can now wind the volume up to silly levels an things still sound clear, tight, accurate . If anyone is looking for an upgrade then i can't recommend this stuff enough. Problem is now that I've tryed the studiofoam I'm looking at the other products that Auralex do ( SPEND SPEND) . By the way if any one is looking for a quick fix try these http://www.auralex.com/sound_isolation_mopad/sound_isolation_mopad.asp This product opend up my eyes to what Auralex could to for me .
    Regards,
    Daran.
     
  13. Godfather

    Godfather
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    I told you it's good :D

    Make sure you get some LENRDs for the corners - they're very effective at dealing with the lower frequencies that the Studiofoam can't reach.
     
  14. oaklandraiders

    oaklandraiders
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    Yo

    Ok I havent put the stuff down yet, buy tried rolling it out then banging on it, the effect in the room is quieter, less harshness echo, but no difference in room below, however, its not meant to stop impact noise, only airbourne. As its only on a piece of carpet it wont stop it anyway.

    I've decided as carpet has to come up anyway, I'm going to add a layer of fibreboard, stuff they use under laminate flooring, to give me some impact noise protection.

    Hopefully all done mid next week, but trying to find a reasonable quote from a carpet fitter.
    One of them said Acoustilay is the stuff to use but very very expensive.

    John
     
  15. mw3cdj

    mw3cdj
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    Ok,
    Things are kind of getting addictive here , just ordered a box of LENRD'S http://www.auralex.com/bass_traps_lenrd/bass_traps_lenrd.asp .
    Godfather, where do you advise positioning the LENRD'S, high up in the corners or lower down, i think there is 8 in a box so i take it 2 per corner??
    Regard's
    Daran.
    Just realized, I'll have to do all that calibrating thing again with the BFD :suicide:
     
  16. Godfather

    Godfather
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    Definitely high up in the corners because that's where the bass builds up the most. If you have 4 completely unobstructed corners, this is what I'd do: for each corner, place a LENRD right up in the corner where the 2 walls + ceiling meet. Then leave a gap of 3 or 4 inches below and place another LERND in the vertical corner. If your ceiling is about 8' then this arrangement should mean the LENRDs will just about extend down to ear level. This has numerous acoustical benefits which I'm not qualified enough to explain. This arrangement should give you the most 'bang for your buck'.

    Alternatively, you could try 3 LENRDs in each of the front corners and 1 each at the rear. This will work well too. Better still, buy another box and place 3 in each vertical corners and put the rest in the horizontal corners where the sidewall meets the ceiling.
     
  17. mw3cdj

    mw3cdj
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    Thanks Godfather :smashin:
    All noted, I think I'll try 2 per corner at first and then if needed I'll get another box and go 3 down per corner and 1 each side in the horizontal corners at the front. Do you use a BFD and if so did you notice much of a difference in your graph after you'd finished the Auralex treatment (If you've finished :laugh: )
    Regards,
    Daran
     
  18. Godfather

    Godfather
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    I do use a BFD but after I installed the Auralex treatment I also moved the sub to a different location, so I can't say whether it made a difference to the graph. I still have a huge peak at 32" which is unavoidable in my 16' long room. But since LENRDs only work down to around 80Hz, I doubt they would make much of a difference below that frequency. But trust me, you will definitely HEAR a difference!

    What are your room dimensions by the way?
     
  19. mw3cdj

    mw3cdj
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    It's not a very large room only about 10ft 6 by 14ft 4.
    Are you all done with absorption now or have you some more tweaks to do ;) . Have you thought about diffusion , been reading up on this but placement is critical apparently .
    Regards,
    Daran.
     
  20. Godfather

    Godfather
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    Sorry I kinda forgot about this thread! I'm done with absorption for now and have fitted 8 Metrofusors in the centre of the ceiling - again they do exactly what it says on the tin, making the room 'sound' bigger and a bit more spacious. The improvements isn't as drastic as adding the studiofoam or LENRDs, but it's definitely worthwhile. Another big thumbs up from me.
     
  21. ShinObiWAN

    ShinObiWAN
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    Where in the UK can I buy the Auralex 2" Studiofoam??

    Cheers fellas.
     
  22. mw3cdj

    mw3cdj
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    Got my lot from HERE . Must be one of the best upgrades i ever made.

    Regards,
    Daran
    :smashin:
     
  23. Godfather

    Godfather
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    You beat me to it.
     
  24. ShinObiWAN

    ShinObiWAN
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    Thanks, I'll probably be back with a load more questions after I've priced up for my room.

    Oh, actually, here's a quicky:

    Do you treat every wall in the room?

    Cheers :)
     
  25. mw3cdj

    mw3cdj
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    Hi Godfather,
    Missed your reply there :suicide: .

    Got all my LENRD's up in place and Studiofoam on the wall's , now the misses wants to paint the room:rolleyes: .

    Also without a plasma at the moment , waiting for a replacement .

    So once again MY room's in a mess.

    Nice to hear from someone who's tried diffusion, might give it ago when funds allow . It's hard to believe how much money one can spend on this type of thing.

    Regards,
    Daran
     
  26. mw3cdj

    mw3cdj
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    The front wall is the most important up to about ear level. But you can do as much as you want.
    The more you do the better things seem to get


    Daran
     
  27. Godfather

    Godfather
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    Hard to answer that without writing an essay length reply, but basically, yes'. :D

    You don't need to completely cover the whole wall, just the key reflection points. In my room for example, I've distributed the studiofoam wedges roughly as follows: 40% front wall, 40% both side walls, 20% rear wall, most centred at ear level. I'm generalizing a bit, but I think almost all small to medium sized rooms can be adequately treated with one box of 2" Studiofoam which covers 96 sq ft and one box of 8 LENRD bass traps. That will set you back about £650 including adhesives. Of course you can spend less, but then it won't be as effective.
     
  28. Godfather

    Godfather
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  29. avanzato

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    Be very careful with absorbtion. :nono:

    To much will kill the room and sound terrible.

    I have found that spreading the treatment evenly around the room works well, with the front wall panels behind the speakers. Even when the insulation I used was all piled in the middle of the room it had a noticable effect. I've ended up using about 4-5 sq metre of panels so far which seems plenty for my room.
     
  30. Godfather

    Godfather
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    Too much of anything is bad, but I think with a good broadband absorber (which I define as something that absorbs consistently at all frequenices, in the case of 2" studiofoam down to around 500Hz), it's very difficult to over do it if it's applied with some common sense. If you stuck say carpet on all the walls then that would be different because carpet absorbs at a much narrower frequency range, 'killing' those frequencies but leaving everything else untamed so you end up with an unbalanced sound. I've been to rooms like that and they sound terrible.
     

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