The speed of sound in air is 340 m / s. At what distance from the wall should a person be in order to hear

The speed of sound in air is 340 m / s. At what distance from the wall should a person be in order to hear the main sound and the sound reflected from the wall separately, if the sound sensation persists in a person for about 0.1 s?

Find the path that the sound will travel in 0.1 s

S = V * T = 340 * 0.1 = 34 m.

Let’s designate the distance from a person to a wall through Sst. The sound goes from a person to a wall and back, which means

S = 2 * Sst.

Distance from person to wall

Sst = S / 2 = 34/2 = 17 m.

Answer: 17 m.