Eh, I sincerely doubt anyone's been able to accoustically levitate even one pound, let alone thousands.
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Replying to @PacoBell
Paco, I hear ya. Why of course. That would be impossible. Sort of like that human flight nonsense.
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Replying to @BrianRoemmele
There's optimism and then there's magical thinking. You're veering dangerously into chemtrail UFO whackadoo territory without understanding the physics and engineering that makes acoustic levitation possible. The fact you think higher frequencies equates to more lift is telling.
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Replying to @PacoBell
Paco, I understand and appreciate you insights. The energy levels are as important as the frequencies. As we move past ultrasonics we achieve higher resolution in control and direction. I am certain you agree, millimeter waves are potentially more powerful then audio.
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Replying to @BrianRoemmele
Not really. The only reason you're able to levitate small objects in the first place is because they're trapped between the nodes of standing waves. Any object larger than that node will fail to be trapped. Can do the same with optical "tweezers", but only with μm particles.
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Replying to @PacoBell @BrianRoemmele
And, yes, intensity matters. But at the intensity required to lift a pound of material off the ground, you're basically recreating an explosive detonation many times per second. You'll blow out your eardrums and anyone foolish enough to be anywhere near that contraption.
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Replying to @PacoBell
Paco, indeed if the standing waves were sound and not millimeter waves, you would not hear it and likely not feel it as the frequency approaches move past the ultra violet spectrum.
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Replying to @BrianRoemmele
At the intensities required, you would certainly not hear it, but you would feel it in the form of heat as your skin absorbs the radiation and converts it into phonon vibrations that will quickly cook you alive. This is precisely how your microwave oven works.
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Replying to @PacoBell
Paco, indeed. When the frequencies are concentrated in a small bandwidth. This of course is true. But when the bandwidth is very wide and pulsed it passes harmlessly as a 5G broadcast or an Airport stripper machine. It will make more sense when we see it.
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Replying to @BrianRoemmele
I don't follow. How does UWB get you levitation? Modulation frequency is exactly what you don't want for stable standing waves of known periodicity. Sure, spreading energy over a wider bandwidth might make it less harmful (questionable), but makes it useless for this application.
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Paco, I hear ya. The debate is interesting. Let’s circle back after these systems are shown in the next few months. At that point the information will align better.
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