what is the time interval between incident sound and reflected sound for hearing is called? what is its value?
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Echo is the repetition of the same sound caused by the reflection of sound waves from a surface back to the listener. Time interval between the original sound and the reflected sound must be at least 0.1s
For hearing a distinct sound, the time interval between the original sound and the reflected one must be at least 0.1 s. The persistence of sound in an auditorium is the result of repeated reflections of sound and is called reverberation.
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