Shirin went to an opera house. She appreciated its architecture and furnishing. The curved ceiling draperies, cushions and curtains were perfectly placed. She also saw sound board behind the stage. She now wondered if each of these accessories were placed for the sake aesthetics of the hall or had a scientific reason too.
(a) What is the purpose of curtains, cushions and draperies in an opera house?
(b) How des curved ceiling and sound board help?
(c) List some characteristic qualities of Shirin.
(a) Curtains, draperies and cushions are sound absorbent materials, they reduce reverberation.
(b) Sound boards and curved cutting focuses the sound such that sound after reflection reaches all corners of the hall and spreads evenly across the width of the hall.
Also to avoid the reverberation the walls and roof of the hall are made curved so that sound waves don’t suffer multiple reflections and quality of sound improves.
(c) Shirin is curious, scientific and intelligent.