Why can we not hear an echo at every place
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Echo:-The phenomenon of reflection of sound from a surface is called echo. They can't hear an echo in small room because in it the sound can't be reflected back. For an echo of a sound to be heard,the minimum distance between the source of sound and the walls of the room should be 17.2 m.
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they don't have reflecting walls so they can't hear an echo at every place
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