Acoustic cloak

Acoustic cloak

An acoustic cloak is a technology used to build sound-proof homes, advanced concert halls or stealth warships. It was outlined in the New Journal of Physics in June 2008. Scientists had previously demonstrated devices that cloak objects from microwaves, making them "invisible". "The mathematics behind cloaking has been known for several years," said Professor John Pendry of Imperial College London, "What hasn't been available for sound is the sort of materials you need to build a cloak out of." [http://news.bbc.co.uk/1/hi/sci/tech/7450321.stm]


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Cloak of invisibility — Alberich puts on the Tarnhelm and vanishes; illustration by Arthur Rackham to Richard Wagner s Das Rheingold Plot element from Folk lore and fairy tales First appearan …   Wikipedia

  • Metamaterial cloaking — Electromagnetism Electricity · …   Wikipedia

  • Metamaterial — Aufbau eines Metamaterials für Mikrowellenanwendungen Ein Metamaterial ist eine künstlich hergestellte Struktur, deren Durchlässigkeit für elektrische und magnetische Felder (Permittivität εr und Permeabilität μr) Werte aufweisen, die in der… …   Deutsch Wikipedia

  • Metamaterial — Negative index metamaterial array configuration, which was constructed of copper split ring resonators and wires mounted on interlocking sheets of fiberglass circuit board. The total array consists of 3 by 20×20 unit cells with overall dimensions …   Wikipedia

  • Transformation optics — Electromagnetism Electricity · …   Wikipedia

  • intelligence — /in tel i jeuhns/, n. 1. capacity for learning, reasoning, understanding, and similar forms of mental activity; aptitude in grasping truths, relationships, facts, meanings, etc. 2. manifestation of a high mental capacity: He writes with… …   Universalium

  • Dazzler — This article is about the fictional character. For the non lethal weapon, see dazzler (weapon). For the graphics card, see Cromemco Dazzler. Dazzler Dazzler as seen on the cover of Secret Invasion: X Men #3. Art by Terry Dodson …   Wikipedia

  • Queen live performances — The English rock band Queen is noted for live performances with an energetic atmosphere. A diverse catalogue of songs, massive sound systems, huge lighting rigs, an arsenal of pyrotechnics and many extravagant costumes helped turn shows into… …   Wikipedia

  • Romance languages — romance1 (def. 8). [1770 80] * * * Group of related languages derived from Latin, with nearly 920 million native speakers. The major Romance languages French, Spanish, Portuguese, Italian, and Romanian are national languages. French is probably… …   Universalium

  • Pelagic fish — A school of large pelagic predator fish (giant trevally) sizing up a school of small pelagic prey fish (anchovies) Pelagic fish live near the surface or in the water column of coastal, ocean and lake waters, but not on the bottom of the sea or… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”