nmarshall23 t1_izs2el4 wrote
Reply to comment by -Thenrkst in US researchers have created metamaterials that move in response to ultrasound. They say it could provide a mechanism for movement in robots that would not require them to have an onboard power source. by lughnasadh
Not much.
You couldn't use them like a robot vacuum. They need to be in range of the ultrasound speaker. And the energy transfer rate is going to be ready bad.
If something went really wrong you could always use noise canceling techniques to nullify the ultrasound.
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