One of the design aspects of my Cinematek was the use of ETFE cushions on the roof of the entire theatre building. ETFE is a transparent plastic membrane, which is why only the roof of the theatre had to be a different material. Since my theaters were stacked and only the second theatre's roof was visible along with the transparent cushions, I decided to mimic the appearance of the ETFE roof by having a wavy, undulating ceiling for the theatre as well. The ceiling is composed of a set of alternating curves that scale larger as it reaches the end of the theatre and creates an interesting pattern alike the transparent cushions.
Along the ceiling I added tiles that also copied the wave pattern, which would be used for the reflection of sound. These would be used every other 'wave,' creating a checkerboard pattern on the ceiling only visible to the audience. These tiles would be used to reflect sound, while the exposed bits of the ceiling would absorb sound. I would imagine the ceiling to be concrete to allow for blockage of exterior noises, then covered with another layer of absorbing material. The tiles would be suspended from the ceiling.
(Image from allnoisecontrol.com)
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