Latest Issue of Science News


Feature

On the Rebound

Reversed echoes may fight disease and foster communication

Imagine descending into an Alice-in-Wonderland canyon where the echo that returns when you shout "hello" sounds like "olleh." No such sound-reversal canyons exist in nature. However, physicists in Europe and the United States have recently been creating environments in the laboratory and underwater that exhibit reversed echoing. Instead of actual walls, from which only run-of-the-mill echoes would

Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.

X
This article is available only to subscribing members. Join SSP today or Log in.