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Post by miichiel on Dec 26, 2021 19:57:54 GMT
Hi there,
Just as an experiment, without much knowledge I try to 3D print acoustic diffusers, piramide style. I try to keep the printing time as low as possible. The dimensions I use are 3 by 3 by 2,1 cm and 6 by 6 by 4,1cm;
My question is, will the piramides I print have any effect on the aucoustics of my house, due to they are from plastic and hollow (1m tick wall) (they do feel strong though...). How many piramides should I print (or how big should the surface be filled with piramides) to experience the effect.
I print them in sheets of 2 by 2 big piramides, or 4 by 4 small;
Some other stuff I created in a room with a lot of heavy acoustic where barely 2 people could talk:
This thing was a pain in the butt to make, so many cornered peaces to cut... But it looked pretty well;
This thing turned out nice, if it will do something... I dunno...
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Post by rock on Dec 27, 2021 4:31:54 GMT
Hi Miichiel, those are some very nice looking designs but probably not very good for diffusion or any other kind of acoustic treatment. First thing you should do is read the stickies but in general for acoustic treatment, you need to cover a significant percentage of your room surface; a few square feet of even the "right kind" of treatment will do next to nothing.
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Post by miichiel on Dec 27, 2021 7:45:47 GMT
Hey Rock, Ah yes thanks, will read the stickies. I'm so used to always have stickies at the top I automatically skip them mentally. In the second project, with the wooden diffusers, I also hang up a foam sheet (one which you can sleep on) and that was basically it. The result was that the acoustics where so less echoïng, we could talk with 4 people at the time and just hear each other with ease. So interesting enough, little did work. I hang up another foam sheet on the ceiling, yet then I became slightly dizzy for not getting so much feedback anymore... So.. interesting enough for this big room without that much diffusers, the trick did work... Did it kill most of the accoustics like in a studio, nah not that, but it kill enough. I will read the sticky, and for now keep printing. The big piramides (4 piramides) I am able to print in 2 hours and 6 minutes, which is a pretty sweet time. Will see how much surface i'm able to print in a short amount of time  . |
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Post by rock on Dec 27, 2021 17:20:13 GMT
As you noticed, you can change room acoustics with any change to the room. If you ever walked into an empty room with bare walls ceiling and floor, it's pretty "echoey". As you put pictures on the wall it gets less echoey and if you put big over stuffed sofas and rugs on the floor it gets even less. This should be obvious to all but the most casual observer. If that's good enough for you, you don't need to make a science project out of it.
For music recording and playback, we can get kinda geeky and nurdy about it but you can probably put just about anything on your walls and floor to try to tame flutter echoes etc. If I wanted to treat a room for flutter echoes, I would use porous absorbers instead of diffusors. Porous absorbers (rigid fiberglass or mineral wool cosmetically covered with breathable fabric) 1" to 2" thick placed at ear level alternating so opposing walls have a bare spot.
Diffusors are great, but not just any shaped reflective surface is a diffusor. But any shape (other than flat) will obviously bounce sound around in different directions and help to reduce flutter echoes.
In the end, if using small amounts (or any amount) of pyramid shapes seems to you to improve your room acoustics, I see no reason you can't do that.
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