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Post by gravesnumber9 on Oct 7, 2024 8:58:54 GMT -6
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Post by gravesnumber9 on Oct 7, 2024 9:08:07 GMT -6
I found some measurements but I'm not really familiar with the n10 scale. From what I can tell these seem to be effective in vocal range which makes me feel like they could be useful for helping to isolate mid-range things like piano, guitar, and (of course) vocals.
But I can't tell HOW useful from the charts.
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Post by frans on Oct 7, 2024 9:44:14 GMT -6
The shorter dimension of these things will correspond to the wavelength of the frequency they will "stop". Absorbtion should be little, ecxept for some treble. If you could hang some blankets over them and position two next to each other, they will be usefull if you don't expect too much. I use something in that size to stop the hihat being audible in a guitar amp mic that sits ten feet from the drums. Don't expect any effect at low mids and bass, these waves will just float around them, as they are too small for that.
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Post by gravesnumber9 on Oct 7, 2024 9:54:39 GMT -6
The shorter dimension of these things will correspond to the wavelength of the frequency they will "stop". Absorbtion should be little, ecxept for some treble. If you could hang some blankets over them and position two next to each other, they will be usefull if you don't expect too much. I use something in that size to stop the hihat being audible in a guitar amp mic that sits ten feet from the drums. Don't expect any effect at low mids and bass, these waves will just float around them, as they are too small for that. That's exactly the type of use I'd be looking for. Reducing hi hats in guitar mics, vocals in piano mics, etc etc. Did you take a look at the frequency absorption charts? I don't really have a baseline for N10 values so I'm not sure what it's saying. |
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Post by tonycamphd on Oct 7, 2024 10:31:16 GMT -6
used similar many times, those are fine for blocking/attenuating bleeding articulation freq's between mics, the hard boundary can create constructive interference that can be a great thing!(vid) Those you linked probably have a narrow bandwidth, they could cause reflection problems if you are close to them, but they are all useful in the right circumstance ime
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Post by dok on Oct 7, 2024 10:50:37 GMT -6
If you have a bunch of them you could "stack" them horizontally and that should provide some more bandwidth reduction, depending on how dense they are.
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Post by Tbone81 on Oct 7, 2024 10:51:03 GMT -6
I’ve used those cubical dividers in an old practice space. That’s also what they have when I record at Jackpot. They work. Not as good as a dedicated, purpose built gobo, but they can be helpful. I think the worst part is the height makes them difficult to position. They’re too high for a drummer to see over. And they’re too short to help for vocals.
For $20 though, why not?
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Post by gravesnumber9 on Oct 7, 2024 10:54:16 GMT -6
I’ve used those cubical dividers in an old practice space. That’s also what they have when I record at Jackpot. They work. Not as good as a dedicated, purpose built gobo, but they can be helpful. I think the worst part is the height makes them difficult to position. They’re too high for a drummer to see over. And they’re too short to help for vocals. For $20 though, why not? Well the initial "why not" was that they're 90 minutes away so it's a whole afternoon of hauling around central Texas! Seems like, as someone said, doubling them up could be useful to increase absorption a bit. I have a note out to the seller to see how many they have left but in the photos it looked like the lot was pretty big. Dozens and dozens (though the sale post is a month old). |
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Post by Quint on Oct 7, 2024 10:56:28 GMT -6
You can always add some mdf to the backside to add some mass for blocking lower frequencies. They'll be heavy as shit though, so you'd maybe also want to figure out how to add wheels.
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Post by frans on Oct 7, 2024 11:30:38 GMT -6
Call out to all the grandmas in your hood and collect some old HEAVY blankets to lay over the gobo things. Less reflections, more absorbtion. Put them up in angles to each other for less "focus" in their reflections.
I didn't look at the frequency absorbtion data but would be suspicious about them anyway. Hard felt surface, that's why you want those 20 blankets to use with them. You may consider airing the blankets if they smell like a dead animal. Or record mostly bands that are heavily into the dead animal thing. You could specialise in death bands and just tell them the blankets are from a mortuary. As long as they don't ask what a mortuary needs blankets for.
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Post by gravesnumber9 on Oct 7, 2024 11:38:52 GMT -6
Call out to all the grandmas in your hood and collect some old HEAVY blankets to lay over the gobo things. Less reflections, more absorbtion. Put them up in angles to each other for less "focus" in their reflections.
I didn't look at the frequency absorbtion data but would be suspicious about them anyway. Hard felt surface, that's why you want those 20 blankets to use with them. You may consider airing the blankets if they smell like a dead animal. Or record mostly bands that are heavily into the dead animal thing. You could specialise in death bands and just tell them the blankets are from a mortuary. As long as they don't ask what a mortuary needs blankets for.
Huge retirement community 20 minutes from my house. I'll go door to door. |
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Post by andersmv on Oct 7, 2024 11:51:16 GMT -6
I had a bunch of those in a space years ago. Same thing happened, there was an office space going out of business and we got them super cheap. If you're got some bad reflections in your space (lots of parallel walls), they'll be absolutely amazing for that. We were in a little square extra room in a house, solved a flutter problem. "Acoustically", they're not going to do much to treat things frequency wise. You'll also never get rid of them if you decide you don't like them  . We had a "magical disappearing spot" on the road outside the house where we could literally put anything out there and have it gone within about 30 minutes. Those things stayed out there for almost a week, we crammed them up in the attic and just didn't say anything when we moved out... |
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Post by gravesnumber9 on Oct 7, 2024 12:14:07 GMT -6
I had a bunch of those in a space years ago. Same thing happened, there was an office space going out of business and we got them super cheap. If you're got some bad reflections in your space (lots of parallel walls), they'll be absolutely amazing for that. We were in a little square extra room in a house, solved a flutter problem. "Acoustically", they're not going to do much to treat things frequency wise. You'll also never get rid of them if you decide you don't like them . We had a "magical disappearing spot" on the road outside the house where we could literally put anything out there and have it gone within about 30 minutes. Those things stayed out there for almost a week, we crammed them up in the attic and just didn't say anything when we moved out... Haha... we have a magic disappearing spot too. Pretty much anything will go. Broken tv's (with a sign on them saying they're broken), cardboard boxes, rusty bikes... pretty much any junk you can think of. |
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Post by tonycamphd on Oct 7, 2024 20:47:57 GMT -6
gobos are as much for constructive interference as they are for more isolation, putting those around Yo Yo Ma probably makes his Cello pop more
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Post by notneeson on Oct 8, 2024 13:57:16 GMT -6
The really good gobos I’ve used have mass loaded vinyl. You could double these up with a layer of that (there’s an equivalent construction product, I think) and even some 703. Make ‘em really good pretty cheaply. Like a sandwich, wrap ‘em in Burlap and maybe find a way to clamp or screw them together.
Maybe too much work, lol.
My friend/client with the amazing studio also has a cabinet shop.
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Post by tonycamphd on Oct 8, 2024 14:18:27 GMT -6
A bit of an OG curve from the OP, but here's a link to some diy rigs I made a long time ago, they have 4" of roxul insulation on the backside of the diffusors and 4" pyramid foam on top of that, they are adjustable up and down 3' to 7' and the diffuse/absorb portion rotates 360* for instant gratification, also they roll around to where every you want to put them, the diffused sides around acoustic instruments sounds unreal I call them my Gobot's or Rollbo's (I'll try to find a finished picture of them) realgearonline.com/post/7186/threadedit; can't find an absorb side pic  |
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Post by gravesnumber9 on Oct 9, 2024 8:51:45 GMT -6
A bit of an OG curve from the OP, but here's a link to some diy rigs I made a long time ago, they have 4" of roxul insulation on the backside of the diffusors and 4" pyramid foam on top of that, they are adjustable up and down 3' to 7' and the diffuse/absorb portion rotates 360* for instant gratification, also they roll around to where every you want to put them, the diffused sides around acoustic instruments sounds unreal I call them my Gobot's or Rollbo's (I'll try to find a finished picture of them) realgearonline.com/post/7186/threadedit; can't find an absorb side pic View AttachmentWhat did you mount those on? |
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Post by tonycamphd on Oct 9, 2024 9:05:37 GMT -6
A bit of an OG curve from the OP, but here's a link to some diy rigs I made a long time ago, they have 4" of roxul insulation on the backside of the diffusors and 4" pyramid foam on top of that, they are adjustable up and down 3' to 7' and the diffuse/absorb portion rotates 360* for instant gratification, also they roll around to where every you want to put them, the diffused sides around acoustic instruments sounds unreal I call them my Gobot's or Rollbo's (I'll try to find a finished picture of them) realgearonline.com/post/7186/threadedit; can't find an absorb side pic View AttachmentWhat did you mount those on? Not sure what you are asking specifically, the skyline blocks were glued to tempered hardboard from lowes, their are aluminum L brackets inside the welded square steel tube frame to screw the skylines on, the absorbent side has finished plywood sides with holes cut in and 4" of roxul is against the back of the skyline, a piece of material over that and 4" pyramid foam curtain pins used to pin the pyramids to the surface, i'm sure gluing the pyramids on would work as good if not better, the results are spectacular. If i had it to do over, i'd make them adjust lower and not quite as tall, and i'd put a big hay bail size cube of absorption on the bottom horizontally, tantamount to having rolling bass traps wherever you want them |
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Post by gravesnumber9 on Oct 9, 2024 9:19:57 GMT -6
What did you mount those on? Not sure what you are asking specifically, the skyline blocks were glued to tempered hardboard from lowes, their are aluminum L brackets inside the welded square steel tube frame to screw the skylines on, the absorbent side has finished plywood sides with holes cut in and 4" of roxul is against the back of the skyline, a piece of material over that and 4" pyramid foam curtain pins used to pin the pyramids to the surface, i'm sure gluing the pyramids on would work as good if not better, the results are spectacular. If i had it to do over, i'd make them adjust lower and not quite as tall, and i'd put a big hay bail size cube of absorption on the bottom horizontally, tantamount to having rolling bass traps wherever you want them The steel frames with the wheels. Those look like a great solution for a lot of things. |
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Post by tonycamphd on Oct 9, 2024 9:56:29 GMT -6
Not sure what you are asking specifically, the skyline blocks were glued to tempered hardboard from lowes, their are aluminum L brackets inside the welded square steel tube frame to screw the skylines on, the absorbent side has finished plywood sides with holes cut in and 4" of roxul is against the back of the skyline, a piece of material over that and 4" pyramid foam curtain pins used to pin the pyramids to the surface, i'm sure gluing the pyramids on would work as good if not better, the results are spectacular. If i had it to do over, i'd make them adjust lower and not quite as tall, and i'd put a big hay bail size cube of absorption on the bottom horizontally, tantamount to having rolling bass traps wherever you want them The steel frames with the wheels. Those look like a great solution for a lot of things. 2x2" steel frames, thin wall, with casters. Yes they are incredibly useful |
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Post by Ward on Oct 9, 2024 20:49:30 GMT -6
I like them!
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Post by drumsound on Oct 10, 2024 7:45:40 GMT -6
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Post by plinker on Oct 10, 2024 7:56:16 GMT -6
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Post by gravesnumber9 on Oct 10, 2024 8:27:23 GMT -6
I went with the "for $20 I might as well pick up 10 or 15 and figure it out later." I'm gonna start by doubling up two of them and figuring out some way to get them to stand up. None of them have brackets or anything. I'll post some updates. I like the idea of putting some 701 or equivalent between the two and wrapping them. But first I'm gonna figure out how to mount them on a stand so that they are GoBo's and not StayBo's. |
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Post by chessparov on Oct 10, 2024 11:29:06 GMT -6
Have we reached the Lowe point here yet?  |
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. We had a "magical disappearing spot" on the road outside the house where we could literally put anything out there and have it gone within about 30 minutes. Those things stayed out there for almost a week, we crammed them up in the attic and just didn't say anything when we moved out...
