Post by williamplayer on Jan 16, 2015 12:30:09 GMT
Acoustic Graphene Could Act as a Sonic Cloak
12 May 2012
THE amazing properties of graphene - a sheet of carbon with atoms in a hexagonal formation - have inspired something similar in the world of sound. By drilling holes in a hexagonal pattern in a sheet of perspex, researchers in Spain have created what they have dubbed "sonic graphene".
The holes act like an array of organ pipes that trap the sound as it moves across the surface. José Sánchez-Dehesa and Daniel Torrent at the Polytechnic University of Valencia claim that the sound moves in the same way as electrons in graphene, with almost no losses (Physical Review Letters, journals.aps.org/prl/abstract/10.1103/PhysRevLett.108.174301). The material could guide sound around objects, acting as a sonic cloaking device.
12 May 2012
THE amazing properties of graphene - a sheet of carbon with atoms in a hexagonal formation - have inspired something similar in the world of sound. By drilling holes in a hexagonal pattern in a sheet of perspex, researchers in Spain have created what they have dubbed "sonic graphene".
The holes act like an array of organ pipes that trap the sound as it moves across the surface. José Sánchez-Dehesa and Daniel Torrent at the Polytechnic University of Valencia claim that the sound moves in the same way as electrons in graphene, with almost no losses (Physical Review Letters, journals.aps.org/prl/abstract/10.1103/PhysRevLett.108.174301). The material could guide sound around objects, acting as a sonic cloaking device.