what is an echo ? how it is formed
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echo is the repition of sound it is produced when minimum distance between voice producer and other object in which voice collides is 16.6 m
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The sensation of sound persists in our brain about 0.1 seconds to hear distinct between the original sound and reflected one must be at least 0.1 seconds if we take the speed of the sound 344 metre per second at a given temperature 22 degree celsius in air is found most must go to the obstacles and repack the reflection of sound is known as Eco to hear a distinct Figo the distance must be 17.2 metres from the sound produced to
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