Why the roof of a movie theatre and a conference hall is curved
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The curved surface of the roof of a hall causes the sound coming from the speaker to reflect back to all the audience so that everyone sitting in the hall could hear the speaker.
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It is curved so as to prevent the sound from being echo and reverberation. there are also may substances which reduces the echo bring in the hall and is curved. the sound goes on the roof of the hall of theatre and is then reflected back to the audience.
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