Ultrasonic Power Transfer Investigated Using Data From uBeam Patent Filings (hackaday.com)

Posted by Soulskill on Tuesday October 20, 2015 @08:40AM from the sufficiently-advanced-technology-is-indistinguishable-from-snake-oil dept.

szczys writes: Transmitting power through the air using sound above the range of human hearing: that's the gist of ultrasonic power transfer. The promise is that you can sit in a coffee shop and use your phone like normal while it's recharged by invisible waves of energy. That's a future we all want — and one that uBeam has been promoting, but hasn't backed it up with proof. Physics is a cruel mistress, and this is no exception. Using the data found in uBeam's patent filings you can see that ultrasonic power transfer is a brutal engineering challenge. It's probably not impossible, but looking at what it would take for a widespread rollout of the tech makes it highly improbable.

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