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R/E/P => R/E/P Archives => Acoustics in Motion => Topic started by: Chris Griffith on June 16, 2009, 02:27:00 am

Title: Recording architecture diffusers..
Post by: Chris Griffith on June 16, 2009, 02:27:00 am
All the studios designed by  recording architecture (aaa-design.com) seem to have similar diffusers... Large pieces of wood with holes cut out of them.   Are these effective?  

They don't seem like they'd be hard to make a bunch of for a tracking room.  
Title: Re: Recording architecture diffusers..
Post by: Thomas Jouanjean on June 16, 2009, 09:34:00 am
Had a quick look, they don't look like diffusors to me...

Though RPG did design this:

http://www.rpginc.com/products/flatffusor/index.htm

Never tried those, but maybe someone on the forum has? Francis?
Title: Re: Recording architecture diffusers..
Post by: Chris Griffith on June 16, 2009, 11:20:36 am
RA has a division that sells acoustic products (http://www.blackbox-design.com/) where they market those panels as actual diffusers.  

Seems like they've designed a lot of high end studios and they would know what they're talking about, but those panels don't look like they could be that effective.  
Title: Re: Recording architecture diffusers..
Post by: Thomas Jouanjean on June 16, 2009, 11:42:34 am
Yes, serious company.

Still, hard to say...

Anyone?
Title: Re: Recording architecture diffusers..
Post by: franman on June 18, 2009, 10:10:47 pm
Yeah I've used the Binary diffusor panels (BAD Panels) from RPG plenty of times. They are basically absorber panels with a little bit of mid-high freq scattering... If you want something back from an absorptive surface they work nicely.

The RA Stuff.... I really don't see how these are diffusors.... Ports to Bass traps... I could see that... but diffusors???

FM
Title: Re: Recording architecture diffusers..
Post by: Thomas Jouanjean on June 19, 2009, 05:48:11 am
franman wrote on Thu, 18 June 2009 21:10

 I really don't see how these are diffusors.... Ports to Bass traps... I could see that... but diffusors???

FM


+1
Title: Re: Recording architecture diffusers..
Post by: Wes Lachot on June 19, 2009, 11:43:13 am
Thomas,

We use the RPG BAD panels all the time. They have excellent low frequency absorption, as well as mid/ high end diffusion. If you talk into one, and compare to an apsorptive panel, the difference is pretty profound. They leave a lot of high end intact, and that really helps when it's so easy to over-deaden a room.

-Wes

Title: Re: Recording architecture diffusers..
Post by: Thomas Jouanjean on June 19, 2009, 12:49:10 pm
Wes Lachot wrote on Fri, 19 June 2009 10:43

Thomas,

We use the RPG BAD panels all the time. They have excellent low frequency absorption, as well as mid/ high end diffusion. If you talk into one, and compare to an apsorptive panel, the difference is pretty profound. They leave a lot of high end intact, and that really helps when it's so easy to over-deaden a room.

-Wes




Thanks Wes.

As in all the designs I do all the panels and systems are custom designed and built, I never work with RPG (or any other "brand" for that matter). When the opportunity/conditions arise, I will for sure try those BAD panels.

Title: Re: Recording architecture diffusers..
Post by: Wes Lachot on June 19, 2009, 07:11:32 pm
Thomas Jouanjean wrote on Fri, 19 June 2009 12:49

Wes Lachot wrote on Fri, 19 June 2009 10:43

Thomas,

We use the RPG BAD panels all the time. They have excellent low frequency absorption, as well as mid/ high end diffusion. If you talk into one, and compare to an apsorptive panel, the difference is pretty profound. They leave a lot of high end intact, and that really helps when it's so easy to over-deaden a room.

-Wes




Thanks Wes.

As in all the designs I do all the panels and systems are custom designed and built, I never work with RPG (or any other "brand" for that matter). When the opportunity/conditions arise, I will for sure try those BAD panels.



And you've done some very nice looking work. Kudos for designing all of your custom diffusors yourself.

As for RPG, they are really different from others brands, in my opinion. They do have a wide variety of off the shelf products, but they are also in to doing custom designs for specific projects, or altering existing designs for a unique application. By working with them we tap into a vast knowledge base and some of the brightest minds in the business.

Plus, RPG has recently aquired a really cool 3D printer, that can print objects! So, if you come up with a diffusor shape that you want to test, they can print that sucker out (in miniature of course), and take it to the lab for testing. And they do have a nice test facility as well.

-Wes
Title: Re: Recording architecture diffusers..
Post by: Chris Griffith on June 19, 2009, 11:36:09 pm
Do BAD panels stop flutter when mounted parallel to another wall or do they need to be mounted at an angle?  
Title: Re: Recording architecture diffusers..
Post by: Wes Lachot on June 20, 2009, 12:49:40 pm
Chris Griffith wrote on Fri, 19 June 2009 23:36

Do BAD panels stop flutter when mounted parallel to another wall or do they need to be mounted at an angle?  

Yes, BAD panels are very effective in treating flutter echos.

-Wes
Title: Re: Recording architecture diffusers..
Post by: mike chafee on June 21, 2009, 10:03:23 am
Bob Hodas created reflection free zones with BAD panels at Paul Stubblebein Mastering in San Francisco.

A great result.

Mike Chafee
Title: Re: Recording architecture diffusers..
Post by: andrebrito on June 22, 2009, 12:37:26 pm
BAD Panel was develloped by Jamnes Angus, who is part of the staff at Salford Uni.

I have used and sold thes BAD panels and they work but are much more than the pictures on the first site who appear only to be perforated panels.
Title: Re: Recording architecture diffusers..
Post by: franman on June 25, 2009, 09:14:55 pm
Andre,

I've used as well quite a bit... but they are perforated panels in front of Fiberglass (at least from RPG)... what 'more' are the devices you have used?? Mind you, the perforation is a binary array.. thus the name, but it is a 'perforated panel'... please elaborate.. thanks.

FM
Title: Re: Recording architecture diffusers..
Post by: andrebrito on June 25, 2009, 10:05:15 pm
I did not explain myself correctly.

What I meant was that the BAD panels are much more than just ordinary perforated panels as shown in the pictures on the first post.

I have used RPG ABSORSOR, BAD PANEL, MODEX, QRDs and the lower PROFOAM and PROCORNER for small home studios.
Title: Re: Recording architecture diffusers..
Post by: franman on June 28, 2009, 09:52:13 am
ahhh...ok. Thanks!
Title: Re: Recording architecture diffusers..
Post by: spm_gl on July 04, 2009, 09:58:27 am
If they use very different impedances in those holes, it could work as a diffusor, but if the backing is homogenous, it will only scatter a very narrow band.
Mind you, I'm a lowly audio engineer, they probably know more physics than I do.

Edit: It looks like they do...
"The absorption characteristics of the perforated panels vary depending on the distance they are supported away from a solid boundary. The closer to the boundary, the lower the overall absorption at higher frequencies."  Shocked

Edit: A bit of research gave me this: http://www.hunecke.de/en/knowledge/diffusors/phase-grids.htm l
Title: Re: Recording architecture diffusers..
Post by: Thomas Jouanjean on July 04, 2009, 01:34:48 pm
Excellent link Jan! Efficient website! Thanks