3D-Printed Plastic Sensor Could Make Siri a Better Listener

Illustration: Steve Cummer/Duke University

Apple’s Siri and Microsoft’s XBox video game consoles still sometimes struggle to hear their owners in a noisy room. A 3-D printed sensor prototype could solve that problem by giving electronic devices the sensitivity to pick out a single voice or sound.

Duke University researchers used common ABS plastic to create an acoustic with properties not found in natural materials—a metamaterial. Their...

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