|
 
- 积分
- 17983
- 威望
- 17983
- 包包
- 26159
|
2014年1月31日 Science 5 k* `5 _& T3 i- x
; z Z% }9 w3 b' y4 ]
COVER A circulator for sound. The arrows represent acoustic signals flowing through the device (diameter: ~20 centimeters), which circulates sound in a nonreciprocal fashion: Signals can flow from left to top, from top to right, and from right to left, but not in the opposite directions. This creates one-way communication channels for sound, allowing listeners to hear but not be heard in return. See pages 495 and 516. Image: Erik Zumalt, Cockrell School of Engineering, The University of Texas at Austin
( t6 u2 G9 |5 a; V0 r1 {* k* x" L( a4 c6 [4 e
|
-
总评分: 威望 + 20
包包 + 20
查看全部评分
|