Slashdot Mirror
Acoustic "Superlens" Could Make Subs Invisible
Al writes "Nicholas Fang and colleagues at the University of Illinois at Urbana-Champaign have created the first acoustic superlens, which could be used to create high-resolution ultrasound images, and perhaps ultimately make subs and ships invisible to sonar. Researchers have previously developed materials that bend light in ways that appear to violate the laws of physics, creating so-called optical superlenses. The acoustic superlens consists of an aluminum array of narrow-necked resonant cavities filed with water — the dimensions of the cavities are tuned to interact with ultrasound waves. When ultrasound waves move through the array, the cavities resonate and the sound is refocused."
Title should be "Acoustic superlens could make subs inaudible".
Thanks to this ground-breaking scientific research, submarines will be even better equipped to collide with each other.
Passive sonar, on the other hand, still works fine.
After all, the thing's got to have a tailpipe.
How can I believe you when you tell me what I don't want to hear?
Another day, anther Slashdot cloaking device story.
You just have to modify the deflector array to rotate the shield harmonics. Problem solved, but you'll have to do it again every few episodes.
Ignorance is the root of all evil.
The trivial solution would be a cavity filled with water same shape and size as the submarine, at the same position as the submarine.
Contrary to the popular belief, there indeed is no God.