We shouted in the valley, and in an instant the echo came from the hillside with great distinctness.
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Related: echo
Prev: So, the echoes from a tree are going to a mass of chaotic acoustic reflections, not like the echo from a moth.
Next: The data he compiled yielded a mathematical formula for the relationship between a room's echo duration, its quantity and quality of sound-absorbing materials, and its spatial volume.
