For an echo to be distinguished as separate, it should reach the ear _________ of a second after the direct sound.
A)one-fourth
B)one-fifth
C)one-eighth
D)one-tenth

Question

Quizplus · Accepted Answer

For an echo to be distinguished as a separate sound, it should reach the ear at least one-tenth of a second after the direct sound. This time gap allows the brain to perceive the echo as a distinct sound rather than merging it with the direct sound.

For an Echo to Be Distinguished as Separate, It Should