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COVER A circulator for sound. The arrows represent acoustic signals fl owing through the device (diameter: ~20 centimeters), which circulates sound in a nonreciprocal fashion: Signals can fl ow 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 retu...
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ژورنال
عنوان ژورنال: Science
سال: 2002
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.295.5561.1795d