To hear a distinct echo each time interval between the original sound and the reflected sound must be: a. 0.2 s b. 1s c. 2s d. 0.1 s
Option d. Persistence of Hearing: To distinguish between two sounds, our hear needs 0.1 Second of time. The human ear cannot distinguish between two sounds if they came at a time interval of less than 0.1 seconds. This is the Average time period as it varies from person to person.
