This thread has been separated from the DIY sticky as it is an
important discussion to have, but should not be retained within the sticky DIY thread
until a satisfactory conclusion has been reached. HR
Corner absorption was patented and expired. I know this history rather well. The
patent, who bought the license and how it was commercialized.
The chunks are
a very typical extension on the acoustic concept of corner absorption, still hardly
understood, by using the edges of the board in function of specific entrance impedance,
and whatever yet undescribed effects.
I'm VERY interested in more details,
but want more than vague references, but people wittingly applying it in function of the
by them known and investigated specific corner absorption behavior. And I do know the
original patent. I entered that reference myself on the net in groups.
I want Max arguments detailed here, and references of people describing this behavior in
function of chunks.
I know how labs react when they see this behavior for the
first time. And that relates already to a Belgian, an Australien and 2 US labs.
And I do mean this question. I realy do.
I'm VERY interested to find
more about this history. And I want yo hear Max arguments with exact references to people
consiously using it, who studied/understood this behavior.
In the most recent Dr.
Peter D'Antonio and Trevor Cox book about absorbers it's still open cell absorption is
still described as an inefficient application contradicting acoustic. The Modex system of
RPG is based on a typical membrane approach. The Pro-Corners of RPG date most likely from
AFTER this text is written.
And I'm sure that Dr. Peter D'Antonio and Trevor Cox
have as much access to Studio related literature than Max.
I know that lots
of people on the net now act if they knew it all along for ages.
Hence I like
details from Max, showing that the corner chunks with there typical design were a known
and understood application.
This design are 'Studiotips Super Chunks' or SSCs
until shown otherwise.
In the States aren't relatively that many commercial
I recently talked with the Manager of Riverbanks (the only lab founded and
designed by Sabine himself and the earliest established in the world in function of
architectural acoustics) in Geneva/Illenois/US personally about this.
that they only were confronted the last years with this phenomenon.
discussed this with an Australian Lab, exact the same story.
I know how surpriced
the lab here was in function of this behavior, type of measurement they never saw before.
I was the first in Belgium who ever measured that in a lab (I don't claim to be the
inventer) and that includes 3 different University labs and 1 lab from an official
When we tried to mathematically explain this behavior, no
literature was found describing this, and literature study is standard procedure in an
Univ. They have very extensive access to literature via there libraries.
those pro's even on academic levels in labs are surpriced, but in groups everybody acts as
they knew it for ages as the most obvious common knowledge.
searching for studio groups messages about it predating Studiotips info in function of
I welcome it with OPEN arms, since I'm really interested in the
history of this,
obvious common knowledge".
And I do remember quiet well my first related discussions
here with Max about corner absorption, which wasn't that obvious or well known to him in
Edited by Hugh Robjohns (11/08/06 09:21 AM)