What should be the dimensions and the shape of classrooms so that no echo can be produced there? Answer the following question in your own words.
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An ""echo"" is a sound repetition or imitation.
When the sound waves strike a hard surface, the surfaces could reflect and repeat the sound.
When there is no echo in a classroom, then the room is in squared shape with a distance of below 17.2 m between the walls.
The cell should also be curved so that the reflection of the sound wave is uniform in the entire room.
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