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See the original Peter D'Antonio patent for the device, it gives actual depths and dimensions, however, it is
a real bear to build.http://www.patents.ibm.com/patquery
and plug in these two patent numbers:
5401921 and 5817992 Go to the images once the actual patent has been pulled, up inthe upper left hand corner, there are graphics representing the patent diagrams/graphics. Click on those to go the actual copies of the patent. These show the diagrams for the device, and will show you actual construction details. My advice: either wait about two more weeks until I release my DIY diffusor note (total cost for a 4X6 diffusor around $30-40), or get the inexpensive retail alternative, from Auralex EXCERPT FROM DIY ACOUSTIC TREATMENTS NOTE:
For a retail solution, Auralex has the T-Fusor for about $220
(includes S&H) for four 2 foot by 2 foot panels that are 5 1/2"
deep. This will create a 4 foot by 4 foot diffusor area on a
wall, and would be considered a minimum amount of diffusion to
provide any real improvements. They are plastic molded sheets,
meant to have the rear filled in with fiberglass or polyester
batting to combat the hollow plastic sound that would
otherwise result from a thin sheet of plastic. Careful use
of some of the expanding foam sold for filling/insulating gaps
and cracks would probably be superior to these loose fillings
for stiffening and damping the plastic walls of the diffusor.
For comparison, a 4X4 foot square of QRD diffusor would run
over $700, and a 45X45 inch square of Art Diffusor, Series E
runs $500.
END OF EXCERPT By the time you get done cutting all the wood, and manufacturing enough of the panels, you would have been better off buying the T-Fusor's. My DIY diffusor will not be that hard to build, or take that long. I just don't
have it fully finalized yet, and written up to post. Jon Risch
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