Question

If a girl is standing in front of a smooth surface from which a sound is reflected the girl may hear

Answer 1

Answer: Echo

Explanation:

Echo means sound being repeated back after a while when sound produced gets reflected back from a surface. The delay in hearing the repeated sound depends on the distance to the reflecting surface. Common example is echo can be heard from an empty well.

Thus, if a girl is standing in front of a smooth surface from which a sound is reflected the girl may hear an echo of her own voice.

Answer 2

If the girl is also near the source of the sound, two alike sets of sounds will be heard.