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Post by tasteliketape on Mar 19, 2015 19:25:21 GMT -6
Hey guys if I build these would you fill the back in with rock wool or 703 or whatever? Or would you leave the back open empty? I needs ya help thanks  |
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Post by tonycamphd on Mar 19, 2015 19:29:51 GMT -6
stuff it with ultra touch cotton insulation, best performance specs of any, and you can use it as a pillow 8)
good luck, cool looking radial slat diffuser btw
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Post by svart on Mar 19, 2015 19:32:34 GMT -6
Or use some burlap to line the inside and stuff with mineral wool.
However, with a slat diffusor like that with only 1 width gap all around, you'd get a very narrow diffusion bandwidth. Most slat diffusors will have many different width slats and openings so that they make a wider bandwidth diffusor.
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Post by tonycamphd on Mar 19, 2015 19:55:16 GMT -6
I think he'll be good with that, most of the diffusion is coming from the radius anyway, the problem with those spaces being the same is if you use a bunch of them you'll get lobing at specific freq's.
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Post by tasteliketape on Mar 19, 2015 20:35:55 GMT -6
Ultra touch was what I was thinking just couldn't remember the name thanks
so being I have a small room would you guys. Think a different type style wold be greatly better ? Room is aprox 12x20 x14 high not good but what I have for a while also cement floor brick walls
should i make the boards different width keep gaps the same maybe vary thicknesses of boards?
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Post by tonycamphd on Mar 19, 2015 22:42:08 GMT -6
Ultra touch was what I was thinking just couldn't remember the name thanks so being I have a small room would you guys. Think a different type style wold be greatly better ? Room is aprox 12x20 x14 high not good but what I have for a while also cement floor brick walls should i make the boards different width keep gaps the same maybe vary thicknesses of boards? well, there are binary patterns that are best employed in qrd, prd diffusors, they usually work more evenly over a broader band, what exactly do you have in there now for diffusion and absorption? btw, concrete floor and brick walls are friggin awesome in measure! imo, your room isn't bad dimensionally at all, especially with 14' ceilings! |
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Post by kcatthedog on Mar 20, 2015 6:13:41 GMT -6
curious ,how do you have your room set up and where are you planning on putting the diffuser. I have similiar dimensions less height abut 8 feet, I built a broad band absorber for my whole back wall, but I had one of those on line acoustic test done by Auralex and they were recommending some diffusion round the centre on the side walls and ceiling, but I never bought or made anything: yet  |
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diffuser
Mar 20, 2015 6:56:35 GMT -6
via mobile
Post by tasteliketape on Mar 20, 2015 6:56:35 GMT -6
I've only been able to spend about 30 min in room and with just a rug on floor thought it sounded pretty good.i have two small diffusers that I use on mainly ac guitar and a boat load of absorption panels (rock wool an 703) various size and thickness.
Still looking at which corner traps I want to build thanks for the help always appreciated
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diffuser
Mar 20, 2015 12:17:02 GMT -6
via mobile
Post by tasteliketape on Mar 20, 2015 12:17:02 GMT -6
I was thinking putting on back wall but since you mentioned sides that might make.more sense.will.aslo add a couple.different types also maybe these back wall.and the qrd on sides
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Post by svart on Mar 20, 2015 12:36:22 GMT -6
There used to be a slat diffusor calculator floating around some of the acoustical engineering forums like John Sayer's forum. I might have a copy of it too, I'll check.
Anyway, you essentially plugged in the frequencies you wanted to diffuse and it would calculate everything for you.
Thickness of slats, width of slats, width of slots, distance from wall, amount of absorption needed behind diffusor, etc.
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Post by tonycamphd on Mar 20, 2015 15:37:31 GMT -6
I was thinking putting on back wall but since you mentioned sides that might make.more sense.will.aslo add a couple.different types also maybe these back wall.and the qrd on sides I'd put mostly diffusion on the back wall, and trap the corners, as far as the side walls go, whatever you do on one side, do the opposite on the other, you don't want to over kill, or over diffuse the room, so absorb on one side, diffuse directly opposite, I also try to mount the center of treatments at the height you imagine your mics being set up, really no point in setting a diffusers up high if the direct reflection below it comes right back to a mic... if that makes sense? |
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diffuser
Mar 20, 2015 17:56:13 GMT -6
via mobile
Post by tasteliketape on Mar 20, 2015 17:56:13 GMT -6
Makes perfect sense thanks a million
great advice as always
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Post by keymod on Mar 21, 2015 5:44:55 GMT -6
If one were starting with a bare room, how does one properly determine offending frequencies? Is the only way is to shoot the room with pink noise & use a scope?
How much change occurs in the spectrum of the room once gear, console, racks, chairs, etc. Are in place?
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Post by tonycamphd on Mar 21, 2015 9:28:04 GMT -6
I was thinking putting on back wall but since you mentioned sides that might make.more sense.will.aslo add a couple.different types also maybe these back wall.and the qrd on sides I'd put mostly diffusion on the back wall, and trap the corners, as far as the side walls go, whatever you do on one side, do the opposite on the other, you don't want to over kill, or over diffuse the room, so absorb on one side, diffuse directly opposite, I also try to mount the center of treatments at the height you imagine your mics being set up, really no point in setting a diffusers up high if the direct reflection below it comes right back to a mic... if that makes sense? I should clarify this, on the side walls its a good idea to put (for an example) a single diffuser, and then an absorber, diffuser, absorber, diffuser, absorber, and then the direct opposite on the opposite wall, making a single wall all of one treatment is NG IMO. The character of the room is made up by the materials it possesses, and yes once its loaded up with all your stuff it changes, i put anything i keep in my room on the long walls in an effort to make the room shape more rectangular than square(for obvious reasons 8). Room Eq wizard is a kick ass tool, it will help isolate low freq problems so you can treat them accordingly, but after a good even frequency response, i'm convinced everything in your hearing range should be treated by your judgement and taste as far as material selections that make your room sound. wood, concrete, brick, block, steel, tile all sound great! I absolutely hate drywall and carpet(other than throw rugs) And high ceilings are a gift from the audio God's! I deluded myself into believing i was going to absorb my ceiling into being "invisible", yeah right, not going to happen...  good luck, and have fun! |
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Post by tasteliketape on Mar 21, 2015 16:07:05 GMT -6
Thanks for the explanation I was a little off in my thinking what you said this helps. My last room I fooled myself into thinking all these absorber panels helped it was over kill an killed the room . Hindsight being 20/20 lol
Svart if you find a link to what you were saying I'd appreciate it
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Post by kcatthedog on Mar 21, 2015 17:19:25 GMT -6
yes link would be good !
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diffuser
Mar 23, 2015 7:49:58 GMT -6
via mobile
Post by tasteliketape on Mar 23, 2015 7:49:58 GMT -6
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Post by svart on Mar 24, 2015 8:40:37 GMT -6
Here's one of the calculators I've found/used for slot resonators(there are other calcs on that page too): www.mh-audio.nl/acalculators.asp#showcalcYou'll need to calculate multiple slat/slot widths to make a broadband absorber. A word of warning though, do not allow the "open" (slots) areas to be more than 45% of the total surface area or you'll end up with a very poor high frequency diffusion. |
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diffuser
May 6, 2015 10:12:06 GMT -6
via mobile
Post by tasteliketape on May 6, 2015 10:12:06 GMT -6
I built some diffusers wood one side then behind that felt an rockwool then over the rockwool 1 inch dacron then cover with material
so point is one side diffuse flip over and have an asorber the other side an engineer I trust says the dacron gives a nice light sheen
Wondering if any one else heard of this
will try out this week end with acoustic guitar an vocal
know this isn't real clear but I'm referring to the dacron
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