what factors are important to get a distinct echo
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:-It is defined as repetition of sound due to the reflection of the orignal sound by any hard obstacle .
#Nature of the obstacle
The reflecting surface of the obstacle must be rigid.
#Distance between the source of sound and obstacle
The echo is heard only if the minimum distance between the source of sound and obstacle is 17m.
#Time gap between the orignal sound and reflected sound
We can hear two sounds seprately if the time gap between these two sound is more than 0.1
# Size of obstacle
Echo also depends upon the size of the obstacle.
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