There are few places on earth where you can experience complete darkness. These places include the depths of the ocean, caves, and mines. Even in these places, however, there is sound. Complete silence does not happen naturally. In order to have complete silence, you need a special type of room called an anechoic chamber.

The word anechoic (meaning “no echo”) was derived from Greek by acoustics expert Leo Beranek. Special measures must be considered when designing an echo-free room. As much ...