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Mechanical Properties Of Fluids

Question
CBSEENPH11019138

What is the difference between echo and a reverberation?

Solution
Echo: An echo is formed when sound wave reflects and comes back after an interval ≥ 0.1s. Therefore in an echo, the original and reflected sound is heard separately.
Reverberation: It consists of successive reflections at intervals very small as compared to 0.1 second so that they cannot produce separate echoes.