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.
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