This thread is to design and critique the construction of a perforated acoustically transparent screen , that caters to The CINEMASCOPE aspect ratio first(in HDTV or dvd), HDTV aspect ratio second and 3/4 a distant third. In fact it prefers 2 3x4 images side by side so that to quote Apocalypse "YOU CAN EITHER SURF OR WATCH..."
Although the mold to produce such a screen will take into account the maximum envelope of the perforation device ( 60 x 141) with the support frame/bezel requirements, the maximum area of perforated viewing area 58.5 by 137.5.
My primary screen size however for the purposes of the design is 45 x 106 with perforated viewing area of 43.5 x 102.3.
Because I have specific plans for the inclusion of the second size screen as part of some condominium friendly system, please excuse me if I sound biased towards optimising to the smaller screen during the setting of design parameters.
For ceiling height 8 feet, for room lenght 18 to 22 for room width 13 to 16. The projector would be mounted in a soffit hush box that could vary (this is the dificult part)from 1.5 to 3. That means that the screen sold alone would need to have a hinge support to dial in the vertical ilumination. The pincushion trim of the screen would be designed to the 2.25 distance which is the middle point of 1.5 and 3.
The smaller screen's bottom distance to the floor is 48".
The larger screen would be an extension of the above screen as the same mold would be used.
By extrapolating interpolating the above ceiling height to lenght ratio an idea of possitionin in slightly larger/smaller rooms could be had.
WHAT ARE MY OPTIONS?
A sturdy , even surface is required, to prevent vibrations from the speakers behind. I know most of us have three channels only up front but I firmly believe in the 5 channel concept for 2.35 like in the Mann's Chinese theater, the academy theater, and SDDS. So a vertically flat but horisontally contoured (albeit slightly larger radius- to accomodate vertical tilting of the speakers down if the screen is slightly tited vertically up) speaker baffle (carpeted acoustical black withe the five vertical spk. cutouts) would have employed on the smaller screen scenario.
At this point it looks like a sealed box with 5 separate acoustical enclosures would be mounted and secured from behind the screen but toed down independent from the screens slightly upward inclination.
That leaves the question of the screen surface.
Plastic seems too fibble and may produce "digestive-like " sounds.
Aluminium velcroed against carpetted support would be ideal.
Peter M why is it so hard to form aluminum into the compound curve of no more than 10degrees?
Seems like the fiberglass kevlar option would work but i'd preffer aluminum.
All help is greatly appreciated.
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