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Post by kcatthedog on Nov 19, 2022 7:13:17 GMT -6
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Post by svart on Nov 21, 2022 10:00:42 GMT -6
Should have used a randomized width of slats though. Having repetitive widths would make absorbing a narrow frequency more efficient but would be limited in overall bandwidth.
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ericn
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Balance Engineer
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Post by ericn on Nov 21, 2022 16:59:04 GMT -6
I love it when people don't know what they are talking about, its a Giant LF absorber with HF reflection. Could it help in his room? yeah maybe but it isn't a diffusor ! I was trying to figure out how one would calculate the lack of diffusion in one of the many Diffusion calculators, but Im not smart enough to figure out how you would input a bunch of blades in front of a giant absorber! Again it could be perfect for his room but just because it kind of looks like a diffusor and he thinks its a diffusor docent make it so. Its like the guy who builds his own Ferrari influenced body on a Fiero, its not a Ferrari and in that case Ferrari will sue your ass off. |
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Post by kcatthedog on Nov 21, 2022 17:42:24 GMT -6
I think some people get reflection confused with diffusion? The slat width gap actually makes this a bit of a tuned absorber, plus some reflection, but not a more radiant random diffusion.
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Post by Ward on Nov 22, 2022 6:26:22 GMT -6
But it looks cool! It would make a great reflective wall (well, part way there)in a small live room or booth! And since it's modular, he can use it somewhere else in the future.  |
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Post by svart on Nov 22, 2022 12:27:00 GMT -6
I think some people get reflection confused with diffusion? The slat width gap actually makes this a bit of a tuned absorber, plus some reflection, but not a more radiant random diffusion. Yes. It's a "tuned" absorber because it selectively reflects and absorbs frequencies. A true diffusor would reflect all frequencies in its working bandwidth but at random vectors away from the incident plane. |
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Post by EmRR on Nov 22, 2022 13:40:14 GMT -6
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ericn
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Post by ericn on Nov 22, 2022 14:15:20 GMT -6
I think some people get reflection confused with diffusion? The slat width gap actually makes this a bit of a tuned absorber, plus some reflection, but not a more radiant random diffusion. Yes. It's a "tuned" absorber because it selectively reflects and absorbs frequencies. A true diffusor would reflect all frequencies in its working bandwidth but at random vectors away from the incident plane. The “ tuned” deserves the quotes, shall we say accidentally tuned? |
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ericn
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Balance Engineer
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Post by ericn on Nov 22, 2022 14:16:52 GMT -6
The poly- cylindrical seams to make a come back every 5-10 years, sort of the Cher of acoustics. |
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Post by EmRR on Nov 22, 2022 14:19:12 GMT -6
The poly- cylindrical seams to make a come back every 5-10 years, sort of the Cher of acoustics. I mean, tube traps.....cut them in half, put them on the wall..... |
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Post by Ward on Nov 23, 2022 11:17:05 GMT -6
I think some people get reflection confused with diffusion? The slat width gap actually makes this a bit of a tuned absorber, plus some reflection, but not a more radiant random diffusion. Yes. It's a "tuned" absorber because it selectively reflects and absorbs frequencies. A true diffusor would reflect all frequencies in its working bandwidth but at random vectors away from the incident plane. I thought diffusors were primarily for breaking up audio and shattering it and throwing it around so that you didn't get standing waves (in conjunction with bass traps) or early reflections (in conjunction with absorption). A fractal diffusor on your ceiling is the MOFO BOMB! Seen mine? Follow the grid depth design everyone uses on a 5" intersecting grid, with heavy acoustical foam. |
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Deleted
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Post by Deleted on Nov 24, 2022 9:46:32 GMT -6
...sort of the Cher of acoustics. We have a winner for the day. |
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Post by kcatthedog on Nov 25, 2022 4:15:55 GMT -6
Yes. It's a "tuned" absorber because it selectively reflects and absorbs frequencies. A true diffusor would reflect all frequencies in its working bandwidth but at random vectors away from the incident plane. I thought diffusors were primarily for breaking up audio and shattering it and throwing it around so that you didn't get standing waves (in conjunction with bass traps) or early reflections (in conjunction with absorption). A fractal diffusor on your ceiling is the MOFO BOMB! Seen mine? Follow the grid depth design everyone uses on a 5" intersecting grid, with heavy acoustical foam. me too, but I thought also, they create a new longer ambiance so smaller rooms seems larger or so I have read. |
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Post by Deleted on Nov 25, 2022 14:06:49 GMT -6
I thought diffusors were primarily for breaking up audio and shattering it and throwing it around so that you didn't get standing waves (in conjunction with bass traps) or early reflections (in conjunction with absorption). A fractal diffusor on your ceiling is the MOFO BOMB! Seen mine? Follow the grid depth design everyone uses on a 5" intersecting grid, with heavy acoustical foam. me too, but I thought also, they create a new longer ambiance so smaller rooms seems larger or so I have read. I'm not sure that they actually create a longer ambience. That's really a function of the acoustical energy hitting the surfaces of the room. What the diffuser does is to scatter that energy at mid and upper frequencies so that you don't get slaps and short standing waves. Then you should hear that as a more pleasant ambience rather than an annoying ring. |
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Post by kcatthedog on Nov 25, 2022 14:09:05 GMT -6
Thx, I was uncertain if I was describing that correctly . I do recall reading that a benefit of diffusion is making a smaller room seem larger, so I wondered how exactly ?
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Post by Deleted on Nov 25, 2022 14:27:04 GMT -6
Thx, I was uncertain if I was describing that correctly . I do recall reading that a benefit of diffusion is making a smaller room seem larger, so I wondered how exactly ? I think the key word is "seem". We hear a slapback or ring as something bad (which it is), not so much as a function of the space. Go in an unfurnished room, clap your hands and make an educated estimate of how long the ring lasts. It can easily be a half-second or so, but most of that is whatever room modes you've stimulated. It sounds and feels like a small room--generally unpleasant. If that reflected energy is diffused properly, you'll be more likely to notice a natural decay rather than the annoying ring or flutter. The duration will be about the same in either case. Low frequency energy is very hard to damp without lots of mass and heavy layers of mineral wool or something similar. It's much easier to damp mids and highs. Damping too much of the higher fc stuff means that the low fc energy has a comparatively longer ring time (even if it's just a hundred ms or so). So the room sounds dead and muffled. Diffusers can help the entire range die away at roughly the same time, so things just sound more natural and less creepy. |
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Post by kcatthedog on Nov 25, 2022 14:43:00 GMT -6
Understood thanks!
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Post by Bat Lanyard on Nov 27, 2022 22:59:45 GMT -6
Video could have been less than a minute long. And no one should follow that path if you're going DIY.
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