Fascinating acoustics article

  • Thread starter Thread starter omtayslick
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They're must trying to make a point about diffusion so that they can sell their fsncy stuff or consulting etc.
 
Obi-Wan zenabI said:
They're must trying to make a point about diffusion so that they can sell their fsncy stuff or consulting etc.
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They seem to be pushing the consulting service, and then the use of Sonotube. That would make for a pretty good profit margin, eh? But if it works, great. The biggest problem that I see with it is the possibility that the effect may be unpredictable.
 
Hey Rick,

Too bad the link didn't work for you. I would love to get some comments from knowledegable people about this. I just tested it, and got there fine. Oh well.

The premise of the article is this: They took a church that seats 450 people, (no other specifics or dimensions given, but there are pictures) and they put 9 or 10, 12" diameter, 4' long sonotubes along each side wall. The claim is that the diffusion from the sonotubes (if you're not familiar with sonotubes they are inexpensive cardboard tubular forms for pouring concrete pilings) cleaned up the intelligibility in the room immensely. No other treatment was done.
 
omtayslick said:
What do you guys think? Is this of any value to us home recordists?
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The main problem in large spaces like churches is excess reverberation. Curved cardboard does very little to help that. The better solution there, and in most home studios, is absorption.

--Ethan
 
The claim is that the diffusion from the sonotubes (if you're not familiar with sonotubes they are inexpensive cardboard tubular forms for pouring concrete pilings) cleaned up the intelligibility in the room immensely. No other treatment was done.
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:rolleyes:People(i.e..."companys")claim stuff all the time. Show me the beef....i.e...by what tests are the "claims" based on?:rolleyes: Personally, I agree with Ethan...
The better solution there, and in most home studios, is absorption.
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Although, I know for a fact that diffusion is used iin large spaces, but usually the "diffusers" are quite large..ie....in size relationship to the wavelengths of interest. And usually these diffusers are very large geometric shapes for LF diffusion. Of course, in very large halls, LOTS of people will contribute to the absorption as well.:D But..my disclaimer is in full force here. Ethan is the expert...although, look at this.:)
fitZ
 

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RICK FITZPATRICK said:
I know for a fact that diffusion is used iin large spaces
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Yes, good point, but this is not so much to diffuse low frequencies. The goal is to spread sound from acoustic instruments on a stage to the farthest reaches of the auditorium. If a PA system is in use the speakers can be aimed as needed, and more can be added to fill in gaps. But orchestras are not usually amplified, and some room shapes end up having hot and cold spots.

--Ethan
 
RICK FITZPATRICK said:
although, look at this.:)
fitZ
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That photo reminds me of RightTrack studios in Manhattan for some reason-- same size and color of wood I guess. But the wood walls in there were pretty much entirely rigged to open up to reveal individual absorbtive panels-- the entire huge space completely and easily alterable in terms of absorbtion or reflectivity. It was something-- like the recording studio in the Death Star.
 
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