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A comment on Ultrasonic Power Transfer Investigated Using Data from uBeam Patent Filings. Parent comment

Re:Ultrasonic Power Transfer Investigated Using Data from uB... by jacquesm on Tuesday October 20, 2015 @02:42PM (#10420939)
And you're going to have the sum and the difference frequencies to deal with as well if the transmitters aren't perfectly synchronized. And those differences may very well be within the audible range.
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Re:Ultrasonic Power Transfer Investigated Using Data from uB... by beamatronic on Tuesday October 20, 2015 @02:56PM (#10421030)
If nothing else, now you've created a new type of Active Denial System
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