RICK FITZPATRICK
New member
Hello everyone. I hesitated before posting this. I hate feeling like an idiot, but how else am I going to find out if this will work. So here goes.
While at work, I was designing some curved store fixtures, when it occured to me, the box and shape I was detailing might possibly function as what knightfly described as a thick, deep slat for a slat absorber, to lower the absorption frequency. At the same time, I remembered him suggesting multi dimensional curved diffusers might work very well, and he described seeing a set design on a game show that would illustrate the concept. I knew of the show he was referring to, and thought that the curved material substrate I was detailing for these store fixtures would be ideal. I then thought, that very few acoustic and studio designers are probably aware of materials used in store fixture work, such as "BENDER BOARD", which is a 3 layer ply, 5/16" thick substrate designed for applying to curved ribs, to make the fronts of fixtures any diameter you want. Therefore, the thought of curved acoustical items might not be a common thing to think about. Sooooo, after tossing some ideas around in my head(clunk, clunk
) I began to wonder why a panel absorber would not work as a BACK on a Slot absorber box. Being 2 boxes in one. One thing led to another, and I thought.."hey, why wouldn't this work...since:
1. The only difference between this and a regular slat absorber is the curved fronts.
2. Slat absorbers described here and elsewhere have different sized slots. So do mine.
3. Slot absorbers are broadband, panel absorbers are single frequency so if I design the box for the mode of importance in my room since I have depth to work with.....(haven't done a mode analysis yet :roll: ) Oh BTW Ethan, you said modes are not that important if you can't move walls....well what are panel absorbers for then, as they are NOT broadband?
4. I see the use of cylindrical diffusers all the time so they must work....or why would people use them.
5. Why can't I combine all elements into one(the reason this thread is being posted!)
6. Not only could the large box be a variable slot absorber due to the slots between slat boxes, but EACH slat boxes could ALSO have ONE slot, as the formula for slat absorbers only describe ONE slot....therefore, why wouldn't curved front, variable thickness and depth slat boxs with one slot work?!!! As well as be the slats for a bigger box?
Ok, enough..here is the drawings. This series of drawings is an elevation of my back wall closet, with the unit in it. There is a plan section, a vertical section, and 2 details. Can anyone offer a yea or neh, and if a yea, any kind of information about the formula for sizing a panel absorber. And will a panel absorber work in this configuration?
Thanks for the patience. And the comments.
fitZ
Ps. I tried to condense the width in pixels, but some were too wide without either cutting off text, or reducing the scale to the point I couldn't read the text. And it will take more than one post to attatch enough drawings to make sense of this brainfart.
fitZ
Here is the elevation.
While at work, I was designing some curved store fixtures, when it occured to me, the box and shape I was detailing might possibly function as what knightfly described as a thick, deep slat for a slat absorber, to lower the absorption frequency. At the same time, I remembered him suggesting multi dimensional curved diffusers might work very well, and he described seeing a set design on a game show that would illustrate the concept. I knew of the show he was referring to, and thought that the curved material substrate I was detailing for these store fixtures would be ideal. I then thought, that very few acoustic and studio designers are probably aware of materials used in store fixture work, such as "BENDER BOARD", which is a 3 layer ply, 5/16" thick substrate designed for applying to curved ribs, to make the fronts of fixtures any diameter you want. Therefore, the thought of curved acoustical items might not be a common thing to think about. Sooooo, after tossing some ideas around in my head(clunk, clunk
) I began to wonder why a panel absorber would not work as a BACK on a Slot absorber box. Being 2 boxes in one. One thing led to another, and I thought.."hey, why wouldn't this work...since:1. The only difference between this and a regular slat absorber is the curved fronts.
2. Slat absorbers described here and elsewhere have different sized slots. So do mine.
3. Slot absorbers are broadband, panel absorbers are single frequency so if I design the box for the mode of importance in my room since I have depth to work with.....(haven't done a mode analysis yet :roll: ) Oh BTW Ethan, you said modes are not that important if you can't move walls....well what are panel absorbers for then, as they are NOT broadband?
4. I see the use of cylindrical diffusers all the time so they must work....or why would people use them.
5. Why can't I combine all elements into one(the reason this thread is being posted!)
6. Not only could the large box be a variable slot absorber due to the slots between slat boxes, but EACH slat boxes could ALSO have ONE slot, as the formula for slat absorbers only describe ONE slot....therefore, why wouldn't curved front, variable thickness and depth slat boxs with one slot work?!!! As well as be the slats for a bigger box?
Ok, enough..here is the drawings. This series of drawings is an elevation of my back wall closet, with the unit in it. There is a plan section, a vertical section, and 2 details. Can anyone offer a yea or neh, and if a yea, any kind of information about the formula for sizing a panel absorber. And will a panel absorber work in this configuration?
Thanks for the patience. And the comments.
fitZ
Ps. I tried to condense the width in pixels, but some were too wide without either cutting off text, or reducing the scale to the point I couldn't read the text. And it will take more than one post to attatch enough drawings to make sense of this brainfart.
fitZ
Here is the elevation.
