Report

Sound Isolation and Giant Linear Nonreciprocity in a Compact Acoustic Circulator

See allHide authors and affiliations

Science  31 Jan 2014:
Vol. 343, Issue 6170, pp. 516-519
DOI: 10.1126/science.1246957

You are currently viewing the editor's summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution

Acoustically Isolated

The control of sound transmission is desirable in a number of circumstances from noise suppression to imaging technologies. Fleury et al. (p. 516; see the cover; see the Perspective by Cummer) studied a subwavelength acoustic meta-atom consisting of a resonant ring cavity biased by an internally circulating fluid. The direction of rotational flow of the fluid (air) changed the resonant properties of the ring cavity, allowing the propagation of sound waves within the cavity to be controlled. With several ports connected to the cavity, sound could be directed to a certain port while isolating transmission in another.