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  • From: Baby Messy <bilboa AT baggins.con>
  • To: ch-scene AT lists.ibiblio.org
  • Subject: Re: Baffling
  • Date: Sun, 17 Dec 2006 16:18:07 -0500

This is very helpful. I will try---thank you.



grady wrote:
> The basic trick/rule of thumb is that the compressed fiberglass absorbs
> sound such that frequency is an inverse function of thickness -- so a
> couple of inches is only good down to, I dunno, 500 hz or something
> (that's a random number I pulled out of my head) and then the thicker
> you go, the better it is at lower freqs, although the benefit tapers
> dramatically as you head below 100hz. (There are data sheets & tables of
> this info on the www, including some good ones buried somewhere on the
> Corning website. Try searching rec.audio.pro via google groups as well.)
>
> So if you're primarily concerned about flutter echoes or the ungood kind
> of "roomyness" in your vocal tracks, you might do fine just making a
> couple of soft pillows with maybe 3 sheets (roughly 6 inches) of the
> compressed fiberglass board & hanging them where you need them. Or you
> might find that some of those reflections are coming from someplace you
> didn't expect (like the ceiling), but that's OK as you can move the
> pillows around.
>
> Or you might get better bang for the buck by just standing further away
> from the wall ;-)
>
> Or, depending on the frequency of the reflections, you might could just
> hang a blanket about a foot out from the wall behind you. This is one
> area where you can experiment all day long, since all you need is time &
> yourself to do the singing.
>
> Good luck,
>
> Ross
>
> Baby Messy wrote:
>> This is great. Thank you. I think this might even be more elaborate than
>> I require. I was going to see if I could build or attain two panels that
>> I could put behind me when i record vocals (the main reason for this new
>> and aching need) but these are good guts.
>>
>>
>>
>> grady wrote:
>>> Hmm, yeah, I think that's where I got mine as well. There are a ton of
>>> plans floating around on the web; the ones I used, which I can't
>>> currently locate, essentially have you build a big box (depending on the
>>> size of your walls, maybe 4x6 feet, as it's easiest to use multiples of
>>> the 2x4' fiberglass pieces) ~ 6" deep out of plywood (that is, plywood
>>> on the "skinny" sides, so the 4x6 foot faces are open). Staple
>>> chickenwire on one of the open sides. Load in your compressed
>>> fiberglass, and then staple chickenwire on the other open side to hold
>>> it all in place. Cover with a loose-weave burlap (or you can go with a
>>> tighter weave, like maybe those t-shirt-fabric bedsheets, and then do
>>> burlap over that, if you're worried about little fiberglass particles
>>> floating around). Screw some diagonals on the back to keep it from
>>> flopping around, and then hang the whole thing on the wall.
>>>
>>> I have 3 of these on the walls, plus I wound up sewing the excess
>>> fiberglass boards into big fabric bags & then suspending them from the
>>> ceiling. Our room wound up deader than one might like, but that's
>>> primarily because it's so small that I can't afford to have it any
>>> live-er than it is. Either way, I didn't spend much money at all on the
>>> whole project, so you can always buy/build as much or more than you need
>>> & then not use some of it.
>>>
>>> The other thing I built that I use all the time & really like are some
>>> small-ish (maybe 3'x4') floorstanding dividers. I got some 1x2s, some
>>> quarter-round molding, some sheetrock, some more chickenwire, some
>>> regular pink-stuff fiberglass, and some fabric. I built frames out of
>>> the 1x2s, nailed in quarter-round on all four inner faces so that the
>>> round side faces out & the flat is about 1/3rd of the way in. Lay in a
>>> sheet of sheetrock cut to fit the frame, then nail in more quarter-round
>>> to hold it securely in place. Lay some pink-stuff fiberglass down and
>>> then staple chickenwire across it to hold it in place. Cover the whole
>>> thing with fabric. Before I assembled mine I also cut some 1x2 "feet"
>>> and bolted them on 2 of the faces so that I can stand them up longway or
>>> tall-way.
>>>
>>> These work great for just-enough-isolation to keep one amp from bleeding
>>> into another's mic. The sheetrock is dense enough to stop the mids, and
>>> the fiberglass knocks down the highs. And they're small/thin enough that
>>> I can slide them behind some furniture when they're not in use.
>>>
>>> Of course, if you don't intend to ever record more than one instrument
>>> at a time, they'd be less useful.
>>>
>>> Ross
>>>
>>> david gourley wrote:
>>>> Baby Messy <bilboa AT baggins.con> put forth the notion in...news:45846a4b$0
>>>> $4919$4c368faf AT roadrunner.com:
>>>>
>>>>> Does anyone local sell baffling for, say, home recording? Or is there a
>>>>> better way?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> gilbertneal.net
>>>> Specialty Products on Sunrise Ave. in Raleigh has the Manville
>>>> equivalent
>>>> to the Corning 703 rigid fiberglass, if you're building anything.
>>>>
>>>> I got 2' x 4' pieces from there at about $8 /sheet.
>>>>
>>>> david
>> -- ch-scene: the list that mirrors alt.music.chapel-hill --
>> http://lists.ibiblio.org/mailman/listinfo/ch-scene
>>
>>
> -- ch-scene: the list that mirrors alt.music.chapel-hill --
> http://lists.ibiblio.org/mailman/listinfo/ch-scene




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