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What is echo and condition for hearing echo?​

Answer» TION:The sound HEARD after reflection from a distance obstacle after the orginal sound has ceased is CALLED echo.The sound heard after reflection from a distance obstacle after the orginal sound has ceased is called echo.ConditionThe sound heard after reflection from a distance obstacle after the orginal sound has ceased is called echo.ConditionAn echo is heard only if the distance of PERSON producing sound from the RIGID obstacles is long enough to allow the reflected sound to reach the person at least 0.1 second after the orginal sound is heard .


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