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 PROBLEMS/THE
CHALLENGE
Medium sized rooms
like recording studios or your dedicated rooms for listening, for recorded
or live played music, needs a most efficient surface to diffuse all kind of
interfering wall reflections and provide a highly homogeneous diffuse sound
field. As known, the smaller the room is the most difficult is to correctly
treat it acoustically. Then, the practical challenge is to have really good
simultaneous results: aesthetically, acoustically and... not
expensive ! |
THE UNIQUE SOLUTION To solve this
problem, learning from
our experience
and using almost all
published international
bibliography,
at the ESR in
Athens, we
decided to try to design and produce a new
kind of acoustical materials using
mainly
psychoacoustic knowledge. The result is the most powerful and aesthetic
diffusing surface in the acoustic industry
:
ROUNDFFUSOR 1
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The
new design of the Roundffusor1® offers the industry’s
highest diffusion quality providing a natural sounding ambiance and the
most effective diffusive control of interfering reflections
The
diffusing Roundffusor1's 3D lobe may be easily sensed at more than 12
meters and hearing it is like reconstructing the initial ''aura''
envelope from the room's recording session.
For this reason, music halls bigger than 500 m3, will be helped by the use
of R1's as acoustical treatment. WHY? There are few halls with ceilings higher than 7-9
meters. In such a halls or better in auditoriums, because the powerful
diffused 3D’s field lobe assured by the bigger grouped R1's surfaces
may be sensed at more than 12 meters in any direction, our diffusers will
shows their full potential. Don’t forget that all this is from only an 11
cm deep and empty material, produced in any custom color or even
artistically painted
on demand.
The lightweight and unique design of Roundffusor1®, providing two lateral
supports, permits mounting on a wall, ceiling or portable partitions using
the wood T-bar rails on a very steady configuration. The R1's complex
functioning allows compartmented self controlled low frequency absorption.
Thus, small edit and control rooms treated with our Roundffusors are from
now on historically homogenous optimized regarding their energy balance in
all low mid and high frequency bands. The
Sweet Spot becomes obsolete ! This means that almost every person in the
room senses the same sound mix.
The
self adaptive bass absorption offered by the Roundffusor removes the
harmful dynamic masking effects induced by the low and very low
frequencies toward the right of the audio scale. This is enough for the
R1 to be named revolutionary. |
 Theoretical
Ideal
diffusion curves for 0°, 45°and 60° signal incidence angles
The R1's
0°-180°
near to ideal
polar
plots diagram
R1's working
frequencies: 10-20.000 Hz, from 10-181 Hz as a complex large aperture
Helmholtz resonator and active/clear diffuser for the rest of the audio
band. R1's room field phase
response: linear. The R1's
accepted sound levels: any
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Absorption.
Regarding the R1, there is no absorption on mid and high frequencies. The
only absorption is the unique R1's self adaptive one for low and very low
frequencies, the eigenfrequencies or, otherwise named, standing waves.
Diffusion
The uniformity of diffusion is characterized by the standard deviation of
the 1/3-octave polar response, for a given angle of incidence. For each of
the 37 angles of incidence, the 37 backscattering impulse response
measurements are made at 5°
increments between 0° and 180°.
The Diffusion Coefficient is the mean standard deviation for all angles of
incidence normalized to the standard deviation of a delta function where 1
equals ideal diffusion –a
semicircle, for 0°, 45°
and 60° incidence angles (see upper
left
fig.).
From the Roundffusor1's
page and also from the left figure,
we may see the exceptional R1’s
uniformity of diffusion for the preferred frequencies indicated by ISO and
beyond that.
It is obvious that many of the tile polar plots obtained as spatial response
from our diffuser are similar with the ideal ones.
It’s
very hard to compare the price & sound quality differences between our
complex diffuser and the concurrency. The R1 is unique and the most advanced
technologically product on the market. Of course, don't forget that for what
is offering is the less expensive from all other products.
Choose the R1 when you need to obtain sure / standard / repeatable
results without sophisticated acoustical studies!
For some people, all this may sound exaggerate, but don't forget that in
this life and universe, the good luck or randomness plays a constructive
role, name it evolution, sometimes, as in the Roundffusor1's case were a
design progression of interrelated phenomena evolved in this patent. Or, if
you prefer, stay put in the past... The Useful Challenge!
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Generally,
all that is necessary as a room treatment are 9 Roundffusors ® ( or
more, from case to case) and your audio system or your musical instruments
It is supposed that will be a carpet on the whole floor surface. Don't
forget that all 9 Roundffusors occupies only a total area of 176x176 cm
from one wall. No other room changes are required. May be used in all
critical listening rooms including recording& TV studios, home theatres,
quality control rooms, film mix and dubbing stages, CD mastering, music
practice or normal residential rooms and also rooms for professional
reviewers. The live or recorded music will have a sound beautifully
similar from room to room. The acoustic repeatability and audio material
interchangeability will be a relative easy task in all situations for any
equipment. |
Example
for mounting 9 diffusers on a wall or ceiling, on a clean and enough plane
surface. For best results the grouped Roundffusors must be mounted
symmetrically towards the common loudspeakers axis plane either behind
the speakers, either on the opposite wall, and on the ceiling if
necessary.
Mounted
on both ceiling and one wall, a more powerful and homogenous 3D lobe will
result. So, we have 4 parallel wood supports/rails for 3 rows of
Roundffusors. An entire wood support is 58 x 3=174cm long. Each diffuser is
mounted upon two lateral supports ( we need one or two screws per each
58 cm wood support provided ) , and all diffusers are mounted in parallel
rows, vertically or horizontally relative to the floor. |
Each second
support is
common
for three neighbor R1's
in a row or column.
Because the diffusers are mounted in rows, in fact, the 3
Roundffusors in a row needs only 6 screws, 6 diffusers needs 9 screws and
all 9 needs, you guess, only 12 screws. If you want to be more secure you
put more. If mounted on a wood surface, nails are enough.
Maybe
you think ''big'' but each wood rail is a section of 30x30mm and some
174cm long for rows of 3 R1.
All 9
Roundffusors weights only 9x2=18
Kg, so need to
worry about. The way they are mounted makes them to behave like very heavy
plastic box, so no audible
resonance will
result and , if you are afraid of
it,
NO
SOUND
COLORATION
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Material: high impact polystyrene
Dimensions:
58 x 58 x 11 cm
Unit
weight: 2 Kg (one R1+ 2 wood rails). Packaged in hard carton boxes, 3
R1’s units per box, each box about 9 Kg. Carton box
external
dimensions: 60 x 60 x 34 cm
Flammability
rating: Standard ISO UL94/HB , 1,6 mm. Standard finish is massif white
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Phone /Fax: +
30 210 20 27 191
Email:
liviu@zainea.com
Mr. Zainea
Liviu / ESR, Peresiadou 14, Athens, TK 11141, Greece
The Roundffusor1 is now an US PATENT NR.7261182
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The new
Commercial R1's
prospectus
is here |
