When sound waves encounter a hard surface, they bounce back, similar to how light reflects off a mirror. If the surface is far enough away (typically more than 17 meters for a distinct echo in air), the reflected sound is perceived as a separate sound from the original, which is called an echo.
Which of the following is a cause of echo?
Asked in JPSC CS Prelims 2024 · Topic: Sound (Reflection of Sound: Echo, Reverberation, and their Applications)
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