Why cannot we hear echoes in small rooms

1.	Why cannot we hear echoes in small rooms
Answer» n'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 roomshould be 17.2 m.Obviously,in ASMALL room echoes cannot beheard.

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Why cannot we hear echoes in small rooms

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