> At the far end you’ll hear (although in reality, your brain will almost certainly cover this up for you) distortion caused by the sound wave defracting off th

> At the far end you’ll hear (although in reality, your brain will almost certainly cover this up for you) distortion caused by the sound wave defracting off the obstacle and interfering with the primary wavefront. See: https://en.wikipedia.org/wiki/Human_echolocation https://en.wikipedia.org/wiki/Human_echolocation